commit: 22edce8a3bff3be008dd11b73522dd4109bfe055 Author: Mike Pagano <mpagano <AT> gentoo <DOT> org> AuthorDate: Thu Jul 7 16:18:40 2022 +0000 Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org> CommitDate: Thu Jul 7 16:18:40 2022 +0000 URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=22edce8a
Linux patch 4.19.251 Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org> 0000_README | 4 + 1250_linux-4.19.251.patch | 1676 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1680 insertions(+) diff --git a/0000_README b/0000_README index 295b34e0..1fd6a3cd 100644 --- a/0000_README +++ b/0000_README @@ -1039,6 +1039,10 @@ Patch: 1249_linux-4.19.250.patch From: https://www.kernel.org Desc: Linux 4.19.250 +Patch: 1250_linux-4.19.251.patch +From: https://www.kernel.org +Desc: Linux 4.19.251 + Patch: 1500_XATTR_USER_PREFIX.patch From: https://bugs.gentoo.org/show_bug.cgi?id=470644 Desc: Support for namespace user.pax.* on tmpfs. diff --git a/1250_linux-4.19.251.patch b/1250_linux-4.19.251.patch new file mode 100644 index 00000000..896b550f --- /dev/null +++ b/1250_linux-4.19.251.patch @@ -0,0 +1,1676 @@ +diff --git a/Makefile b/Makefile +index f78a5a3604c31..35717e4c2b870 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,7 +1,7 @@ + # SPDX-License-Identifier: GPL-2.0 + VERSION = 4 + PATCHLEVEL = 19 +-SUBLEVEL = 250 ++SUBLEVEL = 251 + EXTRAVERSION = + NAME = "People's Front" + +diff --git a/arch/arm/xen/p2m.c b/arch/arm/xen/p2m.c +index 8a8a388549e7a..e04b5044f5973 100644 +--- a/arch/arm/xen/p2m.c ++++ b/arch/arm/xen/p2m.c +@@ -61,11 +61,12 @@ out: + + unsigned long __pfn_to_mfn(unsigned long pfn) + { +- struct rb_node *n = phys_to_mach.rb_node; ++ struct rb_node *n; + struct xen_p2m_entry *entry; + unsigned long irqflags; + + read_lock_irqsave(&p2m_lock, irqflags); ++ n = phys_to_mach.rb_node; + while (n) { + entry = rb_entry(n, struct xen_p2m_entry, rbnode_phys); + if (entry->pfn <= pfn && +@@ -151,10 +152,11 @@ bool __set_phys_to_machine_multi(unsigned long pfn, + int rc; + unsigned long irqflags; + struct xen_p2m_entry *p2m_entry; +- struct rb_node *n = phys_to_mach.rb_node; ++ struct rb_node *n; + + if (mfn == INVALID_P2M_ENTRY) { + write_lock_irqsave(&p2m_lock, irqflags); ++ n = phys_to_mach.rb_node; + while (n) { + p2m_entry = rb_entry(n, struct xen_p2m_entry, rbnode_phys); + if (p2m_entry->pfn <= pfn && +diff --git a/arch/s390/crypto/arch_random.c b/arch/s390/crypto/arch_random.c +index 4cbb4b6d85a83..1f2d40993c4d2 100644 +--- a/arch/s390/crypto/arch_random.c ++++ b/arch/s390/crypto/arch_random.c +@@ -2,126 +2,17 @@ + /* + * s390 arch random implementation. + * +- * Copyright IBM Corp. 2017, 2018 ++ * Copyright IBM Corp. 2017, 2020 + * Author(s): Harald Freudenberger +- * +- * The s390_arch_random_generate() function may be called from random.c +- * in interrupt context. So this implementation does the best to be very +- * fast. There is a buffer of random data which is asynchronously checked +- * and filled by a workqueue thread. +- * If there are enough bytes in the buffer the s390_arch_random_generate() +- * just delivers these bytes. Otherwise false is returned until the +- * worker thread refills the buffer. +- * The worker fills the rng buffer by pulling fresh entropy from the +- * high quality (but slow) true hardware random generator. This entropy +- * is then spread over the buffer with an pseudo random generator PRNG. +- * As the arch_get_random_seed_long() fetches 8 bytes and the calling +- * function add_interrupt_randomness() counts this as 1 bit entropy the +- * distribution needs to make sure there is in fact 1 bit entropy contained +- * in 8 bytes of the buffer. The current values pull 32 byte entropy +- * and scatter this into a 2048 byte buffer. So 8 byte in the buffer +- * will contain 1 bit of entropy. +- * The worker thread is rescheduled based on the charge level of the +- * buffer but at least with 500 ms delay to avoid too much CPU consumption. +- * So the max. amount of rng data delivered via arch_get_random_seed is +- * limited to 4k bytes per second. + */ + + #include <linux/kernel.h> + #include <linux/atomic.h> + #include <linux/random.h> +-#include <linux/slab.h> + #include <linux/static_key.h> +-#include <linux/workqueue.h> + #include <asm/cpacf.h> + + DEFINE_STATIC_KEY_FALSE(s390_arch_random_available); + + atomic64_t s390_arch_random_counter = ATOMIC64_INIT(0); + EXPORT_SYMBOL(s390_arch_random_counter); +- +-#define ARCH_REFILL_TICKS (HZ/2) +-#define ARCH_PRNG_SEED_SIZE 32 +-#define ARCH_RNG_BUF_SIZE 2048 +- +-static DEFINE_SPINLOCK(arch_rng_lock); +-static u8 *arch_rng_buf; +-static unsigned int arch_rng_buf_idx; +- +-static void arch_rng_refill_buffer(struct work_struct *); +-static DECLARE_DELAYED_WORK(arch_rng_work, arch_rng_refill_buffer); +- +-bool s390_arch_random_generate(u8 *buf, unsigned int nbytes) +-{ +- /* max hunk is ARCH_RNG_BUF_SIZE */ +- if (nbytes > ARCH_RNG_BUF_SIZE) +- return false; +- +- /* lock rng buffer */ +- if (!spin_trylock(&arch_rng_lock)) +- return false; +- +- /* try to resolve the requested amount of bytes from the buffer */ +- arch_rng_buf_idx -= nbytes; +- if (arch_rng_buf_idx < ARCH_RNG_BUF_SIZE) { +- memcpy(buf, arch_rng_buf + arch_rng_buf_idx, nbytes); +- atomic64_add(nbytes, &s390_arch_random_counter); +- spin_unlock(&arch_rng_lock); +- return true; +- } +- +- /* not enough bytes in rng buffer, refill is done asynchronously */ +- spin_unlock(&arch_rng_lock); +- +- return false; +-} +-EXPORT_SYMBOL(s390_arch_random_generate); +- +-static void arch_rng_refill_buffer(struct work_struct *unused) +-{ +- unsigned int delay = ARCH_REFILL_TICKS; +- +- spin_lock(&arch_rng_lock); +- if (arch_rng_buf_idx > ARCH_RNG_BUF_SIZE) { +- /* buffer is exhausted and needs refill */ +- u8 seed[ARCH_PRNG_SEED_SIZE]; +- u8 prng_wa[240]; +- /* fetch ARCH_PRNG_SEED_SIZE bytes of entropy */ +- cpacf_trng(NULL, 0, seed, sizeof(seed)); +- /* blow this entropy up to ARCH_RNG_BUF_SIZE with PRNG */ +- memset(prng_wa, 0, sizeof(prng_wa)); +- cpacf_prno(CPACF_PRNO_SHA512_DRNG_SEED, +- &prng_wa, NULL, 0, seed, sizeof(seed)); +- cpacf_prno(CPACF_PRNO_SHA512_DRNG_GEN, +- &prng_wa, arch_rng_buf, ARCH_RNG_BUF_SIZE, NULL, 0); +- arch_rng_buf_idx = ARCH_RNG_BUF_SIZE; +- } +- delay += (ARCH_REFILL_TICKS * arch_rng_buf_idx) / ARCH_RNG_BUF_SIZE; +- spin_unlock(&arch_rng_lock); +- +- /* kick next check */ +- queue_delayed_work(system_long_wq, &arch_rng_work, delay); +-} +- +-static int __init s390_arch_random_init(void) +-{ +- /* all the needed PRNO subfunctions available ? */ +- if (cpacf_query_func(CPACF_PRNO, CPACF_PRNO_TRNG) && +- cpacf_query_func(CPACF_PRNO, CPACF_PRNO_SHA512_DRNG_GEN)) { +- +- /* alloc arch random working buffer */ +- arch_rng_buf = kmalloc(ARCH_RNG_BUF_SIZE, GFP_KERNEL); +- if (!arch_rng_buf) +- return -ENOMEM; +- +- /* kick worker queue job to fill the random buffer */ +- queue_delayed_work(system_long_wq, +- &arch_rng_work, ARCH_REFILL_TICKS); +- +- /* enable arch random to the outside world */ +- static_branch_enable(&s390_arch_random_available); +- } +- +- return 0; +-} +-arch_initcall(s390_arch_random_init); +diff --git a/arch/s390/include/asm/archrandom.h b/arch/s390/include/asm/archrandom.h +index 9a6835137a164..2c6e1c6ecbe78 100644 +--- a/arch/s390/include/asm/archrandom.h ++++ b/arch/s390/include/asm/archrandom.h +@@ -2,7 +2,7 @@ + /* + * Kernel interface for the s390 arch_random_* functions + * +- * Copyright IBM Corp. 2017 ++ * Copyright IBM Corp. 2017, 2020 + * + * Author: Harald Freudenberger <[email protected]> + * +@@ -15,34 +15,37 @@ + + #include <linux/static_key.h> + #include <linux/atomic.h> ++#include <asm/cpacf.h> + + DECLARE_STATIC_KEY_FALSE(s390_arch_random_available); + extern atomic64_t s390_arch_random_counter; + +-bool s390_arch_random_generate(u8 *buf, unsigned int nbytes); +- +-static inline bool arch_get_random_long(unsigned long *v) ++static inline bool __must_check arch_get_random_long(unsigned long *v) + { + return false; + } + +-static inline bool arch_get_random_int(unsigned int *v) ++static inline bool __must_check arch_get_random_int(unsigned int *v) + { + return false; + } + +-static inline bool arch_get_random_seed_long(unsigned long *v) ++static inline bool __must_check arch_get_random_seed_long(unsigned long *v) + { + if (static_branch_likely(&s390_arch_random_available)) { +- return s390_arch_random_generate((u8 *)v, sizeof(*v)); ++ cpacf_trng(NULL, 0, (u8 *)v, sizeof(*v)); ++ atomic64_add(sizeof(*v), &s390_arch_random_counter); ++ return true; + } + return false; + } + +-static inline bool arch_get_random_seed_int(unsigned int *v) ++static inline bool __must_check arch_get_random_seed_int(unsigned int *v) + { + if (static_branch_likely(&s390_arch_random_available)) { +- return s390_arch_random_generate((u8 *)v, sizeof(*v)); ++ cpacf_trng(NULL, 0, (u8 *)v, sizeof(*v)); ++ atomic64_add(sizeof(*v), &s390_arch_random_counter); ++ return true; + } + return false; + } +diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c +index 098794fc5dc81..bfd6c01a68f07 100644 +--- a/arch/s390/kernel/setup.c ++++ b/arch/s390/kernel/setup.c +@@ -851,6 +851,11 @@ static void __init setup_randomness(void) + if (stsi(vmms, 3, 2, 2) == 0 && vmms->count) + add_device_randomness(&vmms->vm, sizeof(vmms->vm[0]) * vmms->count); + memblock_free((unsigned long) vmms, PAGE_SIZE); ++ ++#ifdef CONFIG_ARCH_RANDOM ++ if (cpacf_query_func(CPACF_PRNO, CPACF_PRNO_TRNG)) ++ static_branch_enable(&s390_arch_random_available); ++#endif + } + + /* +diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c +index 482d2e37e20c7..7ee618ab1567b 100644 +--- a/drivers/block/xen-blkfront.c ++++ b/drivers/block/xen-blkfront.c +@@ -151,6 +151,10 @@ static unsigned int xen_blkif_max_ring_order; + module_param_named(max_ring_page_order, xen_blkif_max_ring_order, int, 0444); + MODULE_PARM_DESC(max_ring_page_order, "Maximum order of pages to be used for the shared ring"); + ++static bool __read_mostly xen_blkif_trusted = true; ++module_param_named(trusted, xen_blkif_trusted, bool, 0644); ++MODULE_PARM_DESC(trusted, "Is the backend trusted"); ++ + #define BLK_RING_SIZE(info) \ + __CONST_RING_SIZE(blkif, XEN_PAGE_SIZE * (info)->nr_ring_pages) + +@@ -211,6 +215,7 @@ struct blkfront_info + unsigned int feature_discard:1; + unsigned int feature_secdiscard:1; + unsigned int feature_persistent:1; ++ unsigned int bounce:1; + unsigned int discard_granularity; + unsigned int discard_alignment; + /* Number of 4KB segments handled */ +@@ -300,8 +305,8 @@ static int fill_grant_buffer(struct blkfront_ring_info *rinfo, int num) + if (!gnt_list_entry) + goto out_of_memory; + +- if (info->feature_persistent) { +- granted_page = alloc_page(GFP_NOIO); ++ if (info->bounce) { ++ granted_page = alloc_page(GFP_NOIO | __GFP_ZERO); + if (!granted_page) { + kfree(gnt_list_entry); + goto out_of_memory; +@@ -320,7 +325,7 @@ out_of_memory: + list_for_each_entry_safe(gnt_list_entry, n, + &rinfo->grants, node) { + list_del(&gnt_list_entry->node); +- if (info->feature_persistent) ++ if (info->bounce) + __free_page(gnt_list_entry->page); + kfree(gnt_list_entry); + i--; +@@ -366,7 +371,7 @@ static struct grant *get_grant(grant_ref_t *gref_head, + /* Assign a gref to this page */ + gnt_list_entry->gref = gnttab_claim_grant_reference(gref_head); + BUG_ON(gnt_list_entry->gref == -ENOSPC); +- if (info->feature_persistent) ++ if (info->bounce) + grant_foreign_access(gnt_list_entry, info); + else { + /* Grant access to the GFN passed by the caller */ +@@ -390,7 +395,7 @@ static struct grant *get_indirect_grant(grant_ref_t *gref_head, + /* Assign a gref to this page */ + gnt_list_entry->gref = gnttab_claim_grant_reference(gref_head); + BUG_ON(gnt_list_entry->gref == -ENOSPC); +- if (!info->feature_persistent) { ++ if (!info->bounce) { + struct page *indirect_page; + + /* Fetch a pre-allocated page to use for indirect grefs */ +@@ -705,7 +710,7 @@ static int blkif_queue_rw_req(struct request *req, struct blkfront_ring_info *ri + .grant_idx = 0, + .segments = NULL, + .rinfo = rinfo, +- .need_copy = rq_data_dir(req) && info->feature_persistent, ++ .need_copy = rq_data_dir(req) && info->bounce, + }; + + /* +@@ -1026,11 +1031,12 @@ static void xlvbd_flush(struct blkfront_info *info) + { + blk_queue_write_cache(info->rq, info->feature_flush ? true : false, + info->feature_fua ? true : false); +- pr_info("blkfront: %s: %s %s %s %s %s\n", ++ pr_info("blkfront: %s: %s %s %s %s %s %s %s\n", + info->gd->disk_name, flush_info(info), + "persistent grants:", info->feature_persistent ? + "enabled;" : "disabled;", "indirect descriptors:", +- info->max_indirect_segments ? "enabled;" : "disabled;"); ++ info->max_indirect_segments ? "enabled;" : "disabled;", ++ "bounce buffer:", info->bounce ? "enabled" : "disabled;"); + } + + static int xen_translate_vdev(int vdevice, int *minor, unsigned int *offset) +@@ -1265,7 +1271,7 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo) + if (!list_empty(&rinfo->indirect_pages)) { + struct page *indirect_page, *n; + +- BUG_ON(info->feature_persistent); ++ BUG_ON(info->bounce); + list_for_each_entry_safe(indirect_page, n, &rinfo->indirect_pages, lru) { + list_del(&indirect_page->lru); + __free_page(indirect_page); +@@ -1282,7 +1288,7 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo) + 0, 0UL); + rinfo->persistent_gnts_c--; + } +- if (info->feature_persistent) ++ if (info->bounce) + __free_page(persistent_gnt->page); + kfree(persistent_gnt); + } +@@ -1303,7 +1309,7 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo) + for (j = 0; j < segs; j++) { + persistent_gnt = rinfo->shadow[i].grants_used[j]; + gnttab_end_foreign_access(persistent_gnt->gref, 0, 0UL); +- if (info->feature_persistent) ++ if (info->bounce) + __free_page(persistent_gnt->page); + kfree(persistent_gnt); + } +@@ -1493,7 +1499,7 @@ static int blkif_completion(unsigned long *id, + data.s = s; + num_sg = s->num_sg; + +- if (bret->operation == BLKIF_OP_READ && info->feature_persistent) { ++ if (bret->operation == BLKIF_OP_READ && info->bounce) { + for_each_sg(s->sg, sg, num_sg, i) { + BUG_ON(sg->offset + sg->length > PAGE_SIZE); + +@@ -1552,7 +1558,7 @@ static int blkif_completion(unsigned long *id, + * Add the used indirect page back to the list of + * available pages for indirect grefs. + */ +- if (!info->feature_persistent) { ++ if (!info->bounce) { + indirect_page = s->indirect_grants[i]->page; + list_add(&indirect_page->lru, &rinfo->indirect_pages); + } +@@ -1744,7 +1750,7 @@ static int setup_blkring(struct xenbus_device *dev, + for (i = 0; i < info->nr_ring_pages; i++) + rinfo->ring_ref[i] = GRANT_INVALID_REF; + +- sring = alloc_pages_exact(ring_size, GFP_NOIO); ++ sring = alloc_pages_exact(ring_size, GFP_NOIO | __GFP_ZERO); + if (!sring) { + xenbus_dev_fatal(dev, -ENOMEM, "allocating shared ring"); + return -ENOMEM; +@@ -1847,6 +1853,10 @@ static int talk_to_blkback(struct xenbus_device *dev, + if (!info) + return -ENODEV; + ++ /* Check if backend is trusted. */ ++ info->bounce = !xen_blkif_trusted || ++ !xenbus_read_unsigned(dev->nodename, "trusted", 1); ++ + max_page_order = xenbus_read_unsigned(info->xbdev->otherend, + "max-ring-page-order", 0); + ring_page_order = min(xen_blkif_max_ring_order, max_page_order); +@@ -2273,17 +2283,18 @@ static int blkfront_setup_indirect(struct blkfront_ring_info *rinfo) + if (err) + goto out_of_memory; + +- if (!info->feature_persistent && info->max_indirect_segments) { ++ if (!info->bounce && info->max_indirect_segments) { + /* +- * We are using indirect descriptors but not persistent +- * grants, we need to allocate a set of pages that can be ++ * We are using indirect descriptors but don't have a bounce ++ * buffer, we need to allocate a set of pages that can be + * used for mapping indirect grefs + */ + int num = INDIRECT_GREFS(grants) * BLK_RING_SIZE(info); + + BUG_ON(!list_empty(&rinfo->indirect_pages)); + for (i = 0; i < num; i++) { +- struct page *indirect_page = alloc_page(GFP_KERNEL); ++ struct page *indirect_page = alloc_page(GFP_KERNEL | ++ __GFP_ZERO); + if (!indirect_page) + goto out_of_memory; + list_add(&indirect_page->lru, &rinfo->indirect_pages); +@@ -2375,6 +2386,8 @@ static void blkfront_gather_backend_features(struct blkfront_info *info) + info->feature_persistent = + !!xenbus_read_unsigned(info->xbdev->otherend, + "feature-persistent", 0); ++ if (info->feature_persistent) ++ info->bounce = true; + + indirect_segments = xenbus_read_unsigned(info->xbdev->otherend, + "feature-max-indirect-segments", 0); +@@ -2750,6 +2763,13 @@ static void blkfront_delay_work(struct work_struct *work) + struct blkfront_info *info; + bool need_schedule_work = false; + ++ /* ++ * Note that when using bounce buffers but not persistent grants ++ * there's no need to run blkfront_delay_work because grants are ++ * revoked in blkif_completion or else an error is reported and the ++ * connection is closed. ++ */ ++ + mutex_lock(&blkfront_mutex); + + list_for_each_entry(info, &info_list, info_list) { +diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c +index 1f643782ce047..c9cfc958e853b 100644 +--- a/drivers/hwmon/ibmaem.c ++++ b/drivers/hwmon/ibmaem.c +@@ -563,7 +563,7 @@ static int aem_init_aem1_inst(struct aem_ipmi_data *probe, u8 module_handle) + + res = platform_device_add(data->pdev); + if (res) +- goto ipmi_err; ++ goto dev_add_err; + + platform_set_drvdata(data->pdev, data); + +@@ -611,7 +611,9 @@ hwmon_reg_err: + ipmi_destroy_user(data->ipmi.user); + ipmi_err: + platform_set_drvdata(data->pdev, NULL); +- platform_device_unregister(data->pdev); ++ platform_device_del(data->pdev); ++dev_add_err: ++ platform_device_put(data->pdev); + dev_err: + ida_simple_remove(&aem_ida, data->id); + id_err: +@@ -703,7 +705,7 @@ static int aem_init_aem2_inst(struct aem_ipmi_data *probe, + + res = platform_device_add(data->pdev); + if (res) +- goto ipmi_err; ++ goto dev_add_err; + + platform_set_drvdata(data->pdev, data); + +@@ -751,7 +753,9 @@ hwmon_reg_err: + ipmi_destroy_user(data->ipmi.user); + ipmi_err: + platform_set_drvdata(data->pdev, NULL); +- platform_device_unregister(data->pdev); ++ platform_device_del(data->pdev); ++dev_add_err: ++ platform_device_put(data->pdev); + dev_err: + ida_simple_remove(&aem_ida, data->id); + id_err: +diff --git a/drivers/infiniband/hw/qedr/qedr.h b/drivers/infiniband/hw/qedr/qedr.h +index cca12100c5833..055033aeaef25 100644 +--- a/drivers/infiniband/hw/qedr/qedr.h ++++ b/drivers/infiniband/hw/qedr/qedr.h +@@ -407,6 +407,7 @@ struct qedr_qp { + u32 sq_psn; + u32 qkey; + u32 dest_qp_num; ++ u8 timeout; + + /* Relevant to qps created from kernel space only (ULPs) */ + u8 prev_wqe_size; +diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c +index 7dd6ca11f7062..eb5bcf627b5ed 100644 +--- a/drivers/infiniband/hw/qedr/verbs.c ++++ b/drivers/infiniband/hw/qedr/verbs.c +@@ -2376,6 +2376,8 @@ int qedr_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, + 1 << max_t(int, attr->timeout - 8, 0); + else + qp_params.ack_timeout = 0; ++ ++ qp->timeout = attr->timeout; + } + + if (attr_mask & IB_QP_RETRY_CNT) { +@@ -2535,7 +2537,7 @@ int qedr_query_qp(struct ib_qp *ibqp, + rdma_ah_set_dgid_raw(&qp_attr->ah_attr, ¶ms.dgid.bytes[0]); + rdma_ah_set_port_num(&qp_attr->ah_attr, 1); + rdma_ah_set_sl(&qp_attr->ah_attr, 0); +- qp_attr->timeout = params.timeout; ++ qp_attr->timeout = qp->timeout; + qp_attr->rnr_retry = params.rnr_retry; + qp_attr->retry_cnt = params.retry_cnt; + qp_attr->min_rnr_timer = params.min_rnr_nak_timer; +diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c +index b163329172208..dd56536ab7288 100644 +--- a/drivers/md/dm-raid.c ++++ b/drivers/md/dm-raid.c +@@ -998,12 +998,13 @@ static int validate_region_size(struct raid_set *rs, unsigned long region_size) + static int validate_raid_redundancy(struct raid_set *rs) + { + unsigned int i, rebuild_cnt = 0; +- unsigned int rebuilds_per_group = 0, copies; ++ unsigned int rebuilds_per_group = 0, copies, raid_disks; + unsigned int group_size, last_group_start; + +- for (i = 0; i < rs->md.raid_disks; i++) +- if (!test_bit(In_sync, &rs->dev[i].rdev.flags) || +- !rs->dev[i].rdev.sb_page) ++ for (i = 0; i < rs->raid_disks; i++) ++ if (!test_bit(FirstUse, &rs->dev[i].rdev.flags) && ++ ((!test_bit(In_sync, &rs->dev[i].rdev.flags) || ++ !rs->dev[i].rdev.sb_page))) + rebuild_cnt++; + + switch (rs->md.level) { +@@ -1043,8 +1044,9 @@ static int validate_raid_redundancy(struct raid_set *rs) + * A A B B C + * C D D E E + */ ++ raid_disks = min(rs->raid_disks, rs->md.raid_disks); + if (__is_raid10_near(rs->md.new_layout)) { +- for (i = 0; i < rs->md.raid_disks; i++) { ++ for (i = 0; i < raid_disks; i++) { + if (!(i % copies)) + rebuilds_per_group = 0; + if ((!rs->dev[i].rdev.sb_page || +@@ -1067,10 +1069,10 @@ static int validate_raid_redundancy(struct raid_set *rs) + * results in the need to treat the last (potentially larger) + * set differently. + */ +- group_size = (rs->md.raid_disks / copies); +- last_group_start = (rs->md.raid_disks / group_size) - 1; ++ group_size = (raid_disks / copies); ++ last_group_start = (raid_disks / group_size) - 1; + last_group_start *= group_size; +- for (i = 0; i < rs->md.raid_disks; i++) { ++ for (i = 0; i < raid_disks; i++) { + if (!(i % copies) && !(i > last_group_start)) + rebuilds_per_group = 0; + if ((!rs->dev[i].rdev.sb_page || +@@ -1585,7 +1587,7 @@ static sector_t __rdev_sectors(struct raid_set *rs) + { + int i; + +- for (i = 0; i < rs->md.raid_disks; i++) { ++ for (i = 0; i < rs->raid_disks; i++) { + struct md_rdev *rdev = &rs->dev[i].rdev; + + if (!test_bit(Journal, &rdev->flags) && +@@ -3751,13 +3753,13 @@ static int raid_iterate_devices(struct dm_target *ti, + unsigned int i; + int r = 0; + +- for (i = 0; !r && i < rs->md.raid_disks; i++) +- if (rs->dev[i].data_dev) +- r = fn(ti, +- rs->dev[i].data_dev, +- 0, /* No offset on data devs */ +- rs->md.dev_sectors, +- data); ++ for (i = 0; !r && i < rs->raid_disks; i++) { ++ if (rs->dev[i].data_dev) { ++ r = fn(ti, rs->dev[i].data_dev, ++ 0, /* No offset on data devs */ ++ rs->md.dev_sectors, data); ++ } ++ } + + return r; + } +diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c +index c7bda4b0bcedf..dad426cc0f903 100644 +--- a/drivers/md/raid5.c ++++ b/drivers/md/raid5.c +@@ -7716,6 +7716,7 @@ static int raid5_add_disk(struct mddev *mddev, struct md_rdev *rdev) + */ + if (rdev->saved_raid_disk >= 0 && + rdev->saved_raid_disk >= first && ++ rdev->saved_raid_disk <= last && + conf->disks[rdev->saved_raid_disk].rdev == NULL) + first = rdev->saved_raid_disk; + +diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c +index e3f814e83d9c8..b3eaef31b7673 100644 +--- a/drivers/net/bonding/bond_3ad.c ++++ b/drivers/net/bonding/bond_3ad.c +@@ -2199,7 +2199,8 @@ void bond_3ad_unbind_slave(struct slave *slave) + temp_aggregator->num_of_ports--; + if (__agg_active_ports(temp_aggregator) == 0) { + select_new_active_agg = temp_aggregator->is_active; +- ad_clear_agg(temp_aggregator); ++ if (temp_aggregator->num_of_ports == 0) ++ ad_clear_agg(temp_aggregator); + if (select_new_active_agg) { + netdev_info(bond->dev, "Removing an active aggregator\n"); + /* select new active aggregator */ +diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c +index 61ae622125c43..3fc439d924451 100644 +--- a/drivers/net/bonding/bond_alb.c ++++ b/drivers/net/bonding/bond_alb.c +@@ -1292,12 +1292,12 @@ int bond_alb_initialize(struct bonding *bond, int rlb_enabled) + return res; + + if (rlb_enabled) { +- bond->alb_info.rlb_enabled = 1; + res = rlb_initialize(bond); + if (res) { + tlb_deinitialize(bond); + return res; + } ++ bond->alb_info.rlb_enabled = 1; + } else { + bond->alb_info.rlb_enabled = 0; + } +diff --git a/drivers/net/caif/caif_virtio.c b/drivers/net/caif/caif_virtio.c +index 2814e0dee4bbe..df10e2d0d4b72 100644 +--- a/drivers/net/caif/caif_virtio.c ++++ b/drivers/net/caif/caif_virtio.c +@@ -727,13 +727,21 @@ static int cfv_probe(struct virtio_device *vdev) + /* Carrier is off until netdevice is opened */ + netif_carrier_off(netdev); + ++ /* serialize netdev register + virtio_device_ready() with ndo_open() */ ++ rtnl_lock(); ++ + /* register Netdev */ +- err = register_netdev(netdev); ++ err = register_netdevice(netdev); + if (err) { ++ rtnl_unlock(); + dev_err(&vdev->dev, "Unable to register netdev (%d)\n", err); + goto err; + } + ++ virtio_device_ready(vdev); ++ ++ rtnl_unlock(); ++ + debugfs_init(cfv); + + return 0; +diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c +index 3deda0321c00d..8a67c6f76e3b4 100644 +--- a/drivers/net/dsa/bcm_sf2.c ++++ b/drivers/net/dsa/bcm_sf2.c +@@ -599,6 +599,11 @@ force_link: + reg |= LINK_STS; + if (state->duplex == DUPLEX_FULL) + reg |= DUPLX_MODE; ++ if (state->pause & MLO_PAUSE_TXRX_MASK) { ++ if (state->pause & MLO_PAUSE_TX) ++ reg |= TXFLOW_CNTL; ++ reg |= RXFLOW_CNTL; ++ } + + core_writel(priv, reg, offset); + } +diff --git a/drivers/net/tun.c b/drivers/net/tun.c +index d5bb972cbc9a6..c3390999842a1 100644 +--- a/drivers/net/tun.c ++++ b/drivers/net/tun.c +@@ -333,6 +333,12 @@ static void tun_napi_init(struct tun_struct *tun, struct tun_file *tfile, + } + } + ++static void tun_napi_enable(struct tun_file *tfile) ++{ ++ if (tfile->napi_enabled) ++ napi_enable(&tfile->napi); ++} ++ + static void tun_napi_disable(struct tun_file *tfile) + { + if (tfile->napi_enabled) +@@ -704,7 +710,8 @@ static void __tun_detach(struct tun_file *tfile, bool clean) + tun = rtnl_dereference(tfile->tun); + + if (tun && clean) { +- tun_napi_disable(tfile); ++ if (!tfile->detached) ++ tun_napi_disable(tfile); + tun_napi_del(tfile); + } + +@@ -723,8 +730,10 @@ static void __tun_detach(struct tun_file *tfile, bool clean) + if (clean) { + RCU_INIT_POINTER(tfile->tun, NULL); + sock_put(&tfile->sk); +- } else ++ } else { + tun_disable_queue(tun, tfile); ++ tun_napi_disable(tfile); ++ } + + synchronize_net(); + tun_flow_delete_by_queue(tun, tun->numqueues + 1); +@@ -797,6 +806,7 @@ static void tun_detach_all(struct net_device *dev) + sock_put(&tfile->sk); + } + list_for_each_entry_safe(tfile, tmp, &tun->disabled, next) { ++ tun_napi_del(tfile); + tun_enable_queue(tfile); + tun_queue_purge(tfile); + xdp_rxq_info_unreg(&tfile->xdp_rxq); +@@ -877,6 +887,7 @@ static int tun_attach(struct tun_struct *tun, struct file *file, + + if (tfile->detached) { + tun_enable_queue(tfile); ++ tun_napi_enable(tfile); + } else { + sock_hold(&tfile->sk); + tun_napi_init(tun, tfile, napi, napi_frags); +diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c +index 684eec0aa0d63..cf6ff8732fb2c 100644 +--- a/drivers/net/usb/ax88179_178a.c ++++ b/drivers/net/usb/ax88179_178a.c +@@ -1377,6 +1377,42 @@ static int ax88179_rx_fixup(struct usbnet *dev, struct sk_buff *skb) + * are bundled into this buffer and where we can find an array of + * per-packet metadata (which contains elements encoded into u16). + */ ++ ++ /* SKB contents for current firmware: ++ * <packet 1> <padding> ++ * ... ++ * <packet N> <padding> ++ * <per-packet metadata entry 1> <dummy header> ++ * ... ++ * <per-packet metadata entry N> <dummy header> ++ * <padding2> <rx_hdr> ++ * ++ * where: ++ * <packet N> contains pkt_len bytes: ++ * 2 bytes of IP alignment pseudo header ++ * packet received ++ * <per-packet metadata entry N> contains 4 bytes: ++ * pkt_len and fields AX_RXHDR_* ++ * <padding> 0-7 bytes to terminate at ++ * 8 bytes boundary (64-bit). ++ * <padding2> 4 bytes to make rx_hdr terminate at ++ * 8 bytes boundary (64-bit) ++ * <dummy-header> contains 4 bytes: ++ * pkt_len=0 and AX_RXHDR_DROP_ERR ++ * <rx-hdr> contains 4 bytes: ++ * pkt_cnt and hdr_off (offset of ++ * <per-packet metadata entry 1>) ++ * ++ * pkt_cnt is number of entrys in the per-packet metadata. ++ * In current firmware there is 2 entrys per packet. ++ * The first points to the packet and the ++ * second is a dummy header. ++ * This was done probably to align fields in 64-bit and ++ * maintain compatibility with old firmware. ++ * This code assumes that <dummy header> and <padding2> are ++ * optional. ++ */ ++ + if (skb->len < 4) + return 0; + skb_trim(skb, skb->len - 4); +@@ -1391,51 +1427,66 @@ static int ax88179_rx_fixup(struct usbnet *dev, struct sk_buff *skb) + /* Make sure that the bounds of the metadata array are inside the SKB + * (and in front of the counter at the end). + */ +- if (pkt_cnt * 2 + hdr_off > skb->len) ++ if (pkt_cnt * 4 + hdr_off > skb->len) + return 0; + pkt_hdr = (u32 *)(skb->data + hdr_off); + + /* Packets must not overlap the metadata array */ + skb_trim(skb, hdr_off); + +- for (; ; pkt_cnt--, pkt_hdr++) { ++ for (; pkt_cnt > 0; pkt_cnt--, pkt_hdr++) { ++ u16 pkt_len_plus_padd; + u16 pkt_len; + + le32_to_cpus(pkt_hdr); + pkt_len = (*pkt_hdr >> 16) & 0x1fff; ++ pkt_len_plus_padd = (pkt_len + 7) & 0xfff8; + +- if (pkt_len > skb->len) ++ /* Skip dummy header used for alignment ++ */ ++ if (pkt_len == 0) ++ continue; ++ ++ if (pkt_len_plus_padd > skb->len) + return 0; + + /* Check CRC or runt packet */ +- if (((*pkt_hdr & (AX_RXHDR_CRC_ERR | AX_RXHDR_DROP_ERR)) == 0) && +- pkt_len >= 2 + ETH_HLEN) { +- bool last = (pkt_cnt == 0); +- +- if (last) { +- ax_skb = skb; +- } else { +- ax_skb = skb_clone(skb, GFP_ATOMIC); +- if (!ax_skb) +- return 0; +- } +- ax_skb->len = pkt_len; +- /* Skip IP alignment pseudo header */ +- skb_pull(ax_skb, 2); +- skb_set_tail_pointer(ax_skb, ax_skb->len); +- ax_skb->truesize = pkt_len + sizeof(struct sk_buff); +- ax88179_rx_checksum(ax_skb, pkt_hdr); ++ if ((*pkt_hdr & (AX_RXHDR_CRC_ERR | AX_RXHDR_DROP_ERR)) || ++ pkt_len < 2 + ETH_HLEN) { ++ dev->net->stats.rx_errors++; ++ skb_pull(skb, pkt_len_plus_padd); ++ continue; ++ } + +- if (last) +- return 1; ++ /* last packet */ ++ if (pkt_len_plus_padd == skb->len) { ++ skb_trim(skb, pkt_len); + +- usbnet_skb_return(dev, ax_skb); ++ /* Skip IP alignment pseudo header */ ++ skb_pull(skb, 2); ++ ++ skb->truesize = SKB_TRUESIZE(pkt_len_plus_padd); ++ ax88179_rx_checksum(skb, pkt_hdr); ++ return 1; + } + +- /* Trim this packet away from the SKB */ +- if (!skb_pull(skb, (pkt_len + 7) & 0xFFF8)) ++ ax_skb = skb_clone(skb, GFP_ATOMIC); ++ if (!ax_skb) + return 0; ++ skb_trim(ax_skb, pkt_len); ++ ++ /* Skip IP alignment pseudo header */ ++ skb_pull(ax_skb, 2); ++ ++ skb->truesize = pkt_len_plus_padd + ++ SKB_DATA_ALIGN(sizeof(struct sk_buff)); ++ ax88179_rx_checksum(ax_skb, pkt_hdr); ++ usbnet_skb_return(dev, ax_skb); ++ ++ skb_pull(skb, pkt_len_plus_padd); + } ++ ++ return 0; + } + + static struct sk_buff * +diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c +index c2e872f926f1c..fcf21a1ca7761 100644 +--- a/drivers/net/usb/qmi_wwan.c ++++ b/drivers/net/usb/qmi_wwan.c +@@ -1318,6 +1318,8 @@ static const struct usb_device_id products[] = { + {QMI_QUIRK_SET_DTR(0x1bc7, 0x1031, 3)}, /* Telit LE910C1-EUX */ + {QMI_QUIRK_SET_DTR(0x1bc7, 0x1040, 2)}, /* Telit LE922A */ + {QMI_QUIRK_SET_DTR(0x1bc7, 0x1050, 2)}, /* Telit FN980 */ ++ {QMI_QUIRK_SET_DTR(0x1bc7, 0x1060, 2)}, /* Telit LN920 */ ++ {QMI_QUIRK_SET_DTR(0x1bc7, 0x1070, 2)}, /* Telit FN990 */ + {QMI_FIXED_INTF(0x1bc7, 0x1100, 3)}, /* Telit ME910 */ + {QMI_FIXED_INTF(0x1bc7, 0x1101, 3)}, /* Telit ME910 dual modem */ + {QMI_FIXED_INTF(0x1bc7, 0x1200, 5)}, /* Telit LE920 */ +diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c +index 867cadb1e5ccd..2aa28c961d260 100644 +--- a/drivers/net/usb/usbnet.c ++++ b/drivers/net/usb/usbnet.c +@@ -1998,7 +1998,7 @@ static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, + cmd, reqtype, value, index, size); + + if (size) { +- buf = kmalloc(size, GFP_KERNEL); ++ buf = kmalloc(size, GFP_NOIO); + if (!buf) + goto out; + } +@@ -2030,7 +2030,7 @@ static int __usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, + cmd, reqtype, value, index, size); + + if (data) { +- buf = kmemdup(data, size, GFP_KERNEL); ++ buf = kmemdup(data, size, GFP_NOIO); + if (!buf) + goto out; + } else { +diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c +index 415b26c80fe78..406ef4cc636d4 100644 +--- a/drivers/net/virtio_net.c ++++ b/drivers/net/virtio_net.c +@@ -3105,14 +3105,20 @@ static int virtnet_probe(struct virtio_device *vdev) + } + } + +- err = register_netdev(dev); ++ /* serialize netdev register + virtio_device_ready() with ndo_open() */ ++ rtnl_lock(); ++ ++ err = register_netdevice(dev); + if (err) { + pr_debug("virtio_net: registering device failed\n"); ++ rtnl_unlock(); + goto free_failover; + } + + virtio_device_ready(vdev); + ++ rtnl_unlock(); ++ + err = virtnet_cpu_notif_add(vi); + if (err) { + pr_debug("virtio_net: registering cpu notifier failed\n"); +diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c +index 70af7830eed86..4b75ecb19d890 100644 +--- a/drivers/net/xen-netfront.c ++++ b/drivers/net/xen-netfront.c +@@ -63,6 +63,10 @@ module_param_named(max_queues, xennet_max_queues, uint, 0644); + MODULE_PARM_DESC(max_queues, + "Maximum number of queues per virtual interface"); + ++static bool __read_mostly xennet_trusted = true; ++module_param_named(trusted, xennet_trusted, bool, 0644); ++MODULE_PARM_DESC(trusted, "Is the backend trusted"); ++ + #define XENNET_TIMEOUT (5 * HZ) + + static const struct ethtool_ops xennet_ethtool_ops; +@@ -163,6 +167,9 @@ struct netfront_info { + /* Is device behaving sane? */ + bool broken; + ++ /* Should skbs be bounced into a zeroed buffer? */ ++ bool bounce; ++ + atomic_t rx_gso_checksum_fixup; + }; + +@@ -261,7 +268,7 @@ static struct sk_buff *xennet_alloc_one_rx_buffer(struct netfront_queue *queue) + if (unlikely(!skb)) + return NULL; + +- page = alloc_page(GFP_ATOMIC | __GFP_NOWARN); ++ page = alloc_page(GFP_ATOMIC | __GFP_NOWARN | __GFP_ZERO); + if (!page) { + kfree_skb(skb); + return NULL; +@@ -593,6 +600,34 @@ static void xennet_mark_tx_pending(struct netfront_queue *queue) + queue->tx_link[i] = TX_PENDING; + } + ++struct sk_buff *bounce_skb(const struct sk_buff *skb) ++{ ++ unsigned int headerlen = skb_headroom(skb); ++ /* Align size to allocate full pages and avoid contiguous data leaks */ ++ unsigned int size = ALIGN(skb_end_offset(skb) + skb->data_len, ++ XEN_PAGE_SIZE); ++ struct sk_buff *n = alloc_skb(size, GFP_ATOMIC | __GFP_ZERO); ++ ++ if (!n) ++ return NULL; ++ ++ if (!IS_ALIGNED((uintptr_t)n->head, XEN_PAGE_SIZE)) { ++ WARN_ONCE(1, "misaligned skb allocated\n"); ++ kfree_skb(n); ++ return NULL; ++ } ++ ++ /* Set the data pointer */ ++ skb_reserve(n, headerlen); ++ /* Set the tail pointer and length */ ++ skb_put(n, skb->len); ++ ++ BUG_ON(skb_copy_bits(skb, -headerlen, n->head, headerlen + skb->len)); ++ ++ skb_copy_header(n, skb); ++ return n; ++} ++ + #define MAX_XEN_SKB_FRAGS (65536 / XEN_PAGE_SIZE + 1) + + static netdev_tx_t xennet_start_xmit(struct sk_buff *skb, struct net_device *dev) +@@ -645,9 +680,13 @@ static netdev_tx_t xennet_start_xmit(struct sk_buff *skb, struct net_device *dev + + /* The first req should be at least ETH_HLEN size or the packet will be + * dropped by netback. ++ * ++ * If the backend is not trusted bounce all data to zeroed pages to ++ * avoid exposing contiguous data on the granted page not belonging to ++ * the skb. + */ +- if (unlikely(PAGE_SIZE - offset < ETH_HLEN)) { +- nskb = skb_copy(skb, GFP_ATOMIC); ++ if (np->bounce || unlikely(PAGE_SIZE - offset < ETH_HLEN)) { ++ nskb = bounce_skb(skb); + if (!nskb) + goto drop; + dev_consume_skb_any(skb); +@@ -1953,6 +1992,10 @@ static int talk_to_netback(struct xenbus_device *dev, + + info->netdev->irq = 0; + ++ /* Check if backend is trusted. */ ++ info->bounce = !xennet_trusted || ++ !xenbus_read_unsigned(dev->nodename, "trusted", 1); ++ + /* Check if backend supports multiple queues */ + max_queues = xenbus_read_unsigned(info->xbdev->otherend, + "multi-queue-max-queues", 1); +@@ -2106,6 +2149,9 @@ static int xennet_connect(struct net_device *dev) + err = talk_to_netback(np->xbdev, np); + if (err) + return err; ++ if (np->bounce) ++ dev_info(&np->xbdev->dev, ++ "bouncing transmitted data to zeroed pages\n"); + + /* talk_to_netback() sets the correct number of queues */ + num_queues = dev->real_num_tx_queues; +diff --git a/drivers/nfc/nfcmrvl/i2c.c b/drivers/nfc/nfcmrvl/i2c.c +index 0f22379887ca8..919b4d2f5d8b5 100644 +--- a/drivers/nfc/nfcmrvl/i2c.c ++++ b/drivers/nfc/nfcmrvl/i2c.c +@@ -186,9 +186,9 @@ static int nfcmrvl_i2c_parse_dt(struct device_node *node, + pdata->irq_polarity = IRQF_TRIGGER_RISING; + + ret = irq_of_parse_and_map(node, 0); +- if (ret < 0) { +- pr_err("Unable to get irq, error: %d\n", ret); +- return ret; ++ if (!ret) { ++ pr_err("Unable to get irq\n"); ++ return -EINVAL; + } + pdata->irq = ret; + +diff --git a/drivers/nfc/nfcmrvl/spi.c b/drivers/nfc/nfcmrvl/spi.c +index 8e0ddb4347704..1f4120e3314b2 100644 +--- a/drivers/nfc/nfcmrvl/spi.c ++++ b/drivers/nfc/nfcmrvl/spi.c +@@ -129,9 +129,9 @@ static int nfcmrvl_spi_parse_dt(struct device_node *node, + } + + ret = irq_of_parse_and_map(node, 0); +- if (ret < 0) { +- pr_err("Unable to get irq, error: %d\n", ret); +- return ret; ++ if (!ret) { ++ pr_err("Unable to get irq\n"); ++ return -EINVAL; + } + pdata->irq = ret; + +diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c +index 0df745cad601a..16c52d4c833c5 100644 +--- a/drivers/nfc/nxp-nci/i2c.c ++++ b/drivers/nfc/nxp-nci/i2c.c +@@ -178,6 +178,9 @@ static int nxp_nci_i2c_nci_read(struct nxp_nci_i2c_phy *phy, + + skb_put_data(*skb, (void *)&header, NCI_CTRL_HDR_SIZE); + ++ if (!header.plen) ++ return 0; ++ + r = i2c_master_recv(client, skb_put(*skb, header.plen), header.plen); + if (r != header.plen) { + nfc_err(&client->dev, +diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c +index 48a070a37ea9b..6b38b373ed14f 100644 +--- a/drivers/nvdimm/bus.c ++++ b/drivers/nvdimm/bus.c +@@ -196,8 +196,8 @@ static int nvdimm_clear_badblocks_region(struct device *dev, void *data) + ndr_end = nd_region->ndr_start + nd_region->ndr_size - 1; + + /* make sure we are in the region */ +- if (ctx->phys < nd_region->ndr_start +- || (ctx->phys + ctx->cleared) > ndr_end) ++ if (ctx->phys < nd_region->ndr_start || ++ (ctx->phys + ctx->cleared - 1) > ndr_end) + return 0; + + sector = (ctx->phys - nd_region->ndr_start) / 512; +diff --git a/drivers/xen/gntdev-common.h b/drivers/xen/gntdev-common.h +index 2f8b949c3eeb1..fab6f5a54d5b2 100644 +--- a/drivers/xen/gntdev-common.h ++++ b/drivers/xen/gntdev-common.h +@@ -15,6 +15,8 @@ + #include <linux/mman.h> + #include <linux/mmu_notifier.h> + #include <linux/types.h> ++#include <xen/interface/event_channel.h> ++#include <xen/grant_table.h> + + struct gntdev_dmabuf_priv; + +@@ -61,6 +63,7 @@ struct gntdev_grant_map { + struct gnttab_unmap_grant_ref *unmap_ops; + struct gnttab_map_grant_ref *kmap_ops; + struct gnttab_unmap_grant_ref *kunmap_ops; ++ bool *being_removed; + struct page **pages; + unsigned long pages_vm_start; + +@@ -78,6 +81,11 @@ struct gntdev_grant_map { + /* Needed to avoid allocation in gnttab_dma_free_pages(). */ + xen_pfn_t *frames; + #endif ++ ++ /* Number of live grants */ ++ atomic_t live_grants; ++ /* Needed to avoid allocation in __unmap_grant_pages */ ++ struct gntab_unmap_queue_data unmap_data; + }; + + struct gntdev_grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count, +diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c +index e519063e421e2..492084814f55d 100644 +--- a/drivers/xen/gntdev.c ++++ b/drivers/xen/gntdev.c +@@ -64,11 +64,12 @@ MODULE_PARM_DESC(limit, "Maximum number of grants that may be mapped by " + + static atomic_t pages_mapped = ATOMIC_INIT(0); + ++/* True in PV mode, false otherwise */ + static int use_ptemod; + #define populate_freeable_maps use_ptemod + +-static int unmap_grant_pages(struct gntdev_grant_map *map, +- int offset, int pages); ++static void unmap_grant_pages(struct gntdev_grant_map *map, ++ int offset, int pages); + + static struct miscdevice gntdev_miscdev; + +@@ -125,6 +126,7 @@ static void gntdev_free_map(struct gntdev_grant_map *map) + kfree(map->unmap_ops); + kfree(map->kmap_ops); + kfree(map->kunmap_ops); ++ kfree(map->being_removed); + kfree(map); + } + +@@ -144,12 +146,15 @@ struct gntdev_grant_map *gntdev_alloc_map(struct gntdev_priv *priv, int count, + add->kmap_ops = kcalloc(count, sizeof(add->kmap_ops[0]), GFP_KERNEL); + add->kunmap_ops = kcalloc(count, sizeof(add->kunmap_ops[0]), GFP_KERNEL); + add->pages = kcalloc(count, sizeof(add->pages[0]), GFP_KERNEL); ++ add->being_removed = ++ kcalloc(count, sizeof(add->being_removed[0]), GFP_KERNEL); + if (NULL == add->grants || + NULL == add->map_ops || + NULL == add->unmap_ops || + NULL == add->kmap_ops || + NULL == add->kunmap_ops || +- NULL == add->pages) ++ NULL == add->pages || ++ NULL == add->being_removed) + goto err; + + #ifdef CONFIG_XEN_GRANT_DMA_ALLOC +@@ -245,6 +250,35 @@ void gntdev_put_map(struct gntdev_priv *priv, struct gntdev_grant_map *map) + return; + + atomic_sub(map->count, &pages_mapped); ++ if (map->pages && !use_ptemod) { ++ /* ++ * Increment the reference count. This ensures that the ++ * subsequent call to unmap_grant_pages() will not wind up ++ * re-entering itself. It *can* wind up calling ++ * gntdev_put_map() recursively, but such calls will be with a ++ * reference count greater than 1, so they will return before ++ * this code is reached. The recursion depth is thus limited to ++ * 1. Do NOT use refcount_inc() here, as it will detect that ++ * the reference count is zero and WARN(). ++ */ ++ refcount_set(&map->users, 1); ++ ++ /* ++ * Unmap the grants. This may or may not be asynchronous, so it ++ * is possible that the reference count is 1 on return, but it ++ * could also be greater than 1. ++ */ ++ unmap_grant_pages(map, 0, map->count); ++ ++ /* Check if the memory now needs to be freed */ ++ if (!refcount_dec_and_test(&map->users)) ++ return; ++ ++ /* ++ * All pages have been returned to the hypervisor, so free the ++ * map. ++ */ ++ } + + if (map->notify.flags & UNMAP_NOTIFY_SEND_EVENT) { + notify_remote_via_evtchn(map->notify.event); +@@ -302,6 +336,7 @@ static int set_grant_ptes_as_special(pte_t *pte, pgtable_t token, + + int gntdev_map_grant_pages(struct gntdev_grant_map *map) + { ++ size_t alloced = 0; + int i, err = 0; + + if (!use_ptemod) { +@@ -350,87 +385,109 @@ int gntdev_map_grant_pages(struct gntdev_grant_map *map) + map->pages, map->count); + + for (i = 0; i < map->count; i++) { +- if (map->map_ops[i].status == GNTST_okay) ++ if (map->map_ops[i].status == GNTST_okay) { + map->unmap_ops[i].handle = map->map_ops[i].handle; +- else if (!err) ++ if (!use_ptemod) ++ alloced++; ++ } else if (!err) + err = -EINVAL; + + if (map->flags & GNTMAP_device_map) + map->unmap_ops[i].dev_bus_addr = map->map_ops[i].dev_bus_addr; + + if (use_ptemod) { +- if (map->kmap_ops[i].status == GNTST_okay) ++ if (map->kmap_ops[i].status == GNTST_okay) { ++ if (map->map_ops[i].status == GNTST_okay) ++ alloced++; + map->kunmap_ops[i].handle = map->kmap_ops[i].handle; +- else if (!err) ++ } else if (!err) + err = -EINVAL; + } + } ++ atomic_add(alloced, &map->live_grants); + return err; + } + +-static int __unmap_grant_pages(struct gntdev_grant_map *map, int offset, +- int pages) ++static void __unmap_grant_pages_done(int result, ++ struct gntab_unmap_queue_data *data) + { +- int i, err = 0; +- struct gntab_unmap_queue_data unmap_data; ++ unsigned int i; ++ struct gntdev_grant_map *map = data->data; ++ unsigned int offset = data->unmap_ops - map->unmap_ops; + ++ for (i = 0; i < data->count; i++) { ++ WARN_ON(map->unmap_ops[offset+i].status); ++ pr_debug("unmap handle=%d st=%d\n", ++ map->unmap_ops[offset+i].handle, ++ map->unmap_ops[offset+i].status); ++ map->unmap_ops[offset+i].handle = -1; ++ } ++ /* ++ * Decrease the live-grant counter. This must happen after the loop to ++ * prevent premature reuse of the grants by gnttab_mmap(). ++ */ ++ atomic_sub(data->count, &map->live_grants); ++ ++ /* Release reference taken by __unmap_grant_pages */ ++ gntdev_put_map(NULL, map); ++} ++ ++static void __unmap_grant_pages(struct gntdev_grant_map *map, int offset, ++ int pages) ++{ + if (map->notify.flags & UNMAP_NOTIFY_CLEAR_BYTE) { + int pgno = (map->notify.addr >> PAGE_SHIFT); ++ + if (pgno >= offset && pgno < offset + pages) { + /* No need for kmap, pages are in lowmem */ + uint8_t *tmp = pfn_to_kaddr(page_to_pfn(map->pages[pgno])); ++ + tmp[map->notify.addr & (PAGE_SIZE-1)] = 0; + map->notify.flags &= ~UNMAP_NOTIFY_CLEAR_BYTE; + } + } + +- unmap_data.unmap_ops = map->unmap_ops + offset; +- unmap_data.kunmap_ops = use_ptemod ? map->kunmap_ops + offset : NULL; +- unmap_data.pages = map->pages + offset; +- unmap_data.count = pages; ++ map->unmap_data.unmap_ops = map->unmap_ops + offset; ++ map->unmap_data.kunmap_ops = use_ptemod ? map->kunmap_ops + offset : NULL; ++ map->unmap_data.pages = map->pages + offset; ++ map->unmap_data.count = pages; ++ map->unmap_data.done = __unmap_grant_pages_done; ++ map->unmap_data.data = map; ++ refcount_inc(&map->users); /* to keep map alive during async call below */ + +- err = gnttab_unmap_refs_sync(&unmap_data); +- if (err) +- return err; +- +- for (i = 0; i < pages; i++) { +- if (map->unmap_ops[offset+i].status) +- err = -EINVAL; +- pr_debug("unmap handle=%d st=%d\n", +- map->unmap_ops[offset+i].handle, +- map->unmap_ops[offset+i].status); +- map->unmap_ops[offset+i].handle = -1; +- } +- return err; ++ gnttab_unmap_refs_async(&map->unmap_data); + } + +-static int unmap_grant_pages(struct gntdev_grant_map *map, int offset, +- int pages) ++static void unmap_grant_pages(struct gntdev_grant_map *map, int offset, ++ int pages) + { +- int range, err = 0; ++ int range; ++ ++ if (atomic_read(&map->live_grants) == 0) ++ return; /* Nothing to do */ + + pr_debug("unmap %d+%d [%d+%d]\n", map->index, map->count, offset, pages); + + /* It is possible the requested range will have a "hole" where we + * already unmapped some of the grants. Only unmap valid ranges. + */ +- while (pages && !err) { +- while (pages && map->unmap_ops[offset].handle == -1) { ++ while (pages) { ++ while (pages && map->being_removed[offset]) { + offset++; + pages--; + } + range = 0; + while (range < pages) { +- if (map->unmap_ops[offset+range].handle == -1) ++ if (map->being_removed[offset + range]) + break; ++ map->being_removed[offset + range] = true; + range++; + } +- err = __unmap_grant_pages(map, offset, range); ++ if (range) ++ __unmap_grant_pages(map, offset, range); + offset += range; + pages -= range; + } +- +- return err; + } + + /* ------------------------------------------------------------------ */ +@@ -500,7 +557,6 @@ static int unmap_if_in_range(struct gntdev_grant_map *map, + bool blockable) + { + unsigned long mstart, mend; +- int err; + + if (!in_range(map, start, end)) + return 0; +@@ -514,10 +570,9 @@ static int unmap_if_in_range(struct gntdev_grant_map *map, + map->index, map->count, + map->vma->vm_start, map->vma->vm_end, + start, end, mstart, mend); +- err = unmap_grant_pages(map, ++ unmap_grant_pages(map, + (mstart - map->vma->vm_start) >> PAGE_SHIFT, + (mend - mstart) >> PAGE_SHIFT); +- WARN_ON(err); + + return 0; + } +@@ -558,7 +613,6 @@ static void mn_release(struct mmu_notifier *mn, + { + struct gntdev_priv *priv = container_of(mn, struct gntdev_priv, mn); + struct gntdev_grant_map *map; +- int err; + + mutex_lock(&priv->lock); + list_for_each_entry(map, &priv->maps, next) { +@@ -567,8 +621,7 @@ static void mn_release(struct mmu_notifier *mn, + pr_debug("map %d+%d (%lx %lx)\n", + map->index, map->count, + map->vma->vm_start, map->vma->vm_end); +- err = unmap_grant_pages(map, /* offset */ 0, map->count); +- WARN_ON(err); ++ unmap_grant_pages(map, /* offset */ 0, map->count); + } + list_for_each_entry(map, &priv->freeable_maps, next) { + if (!map->vma) +@@ -576,8 +629,7 @@ static void mn_release(struct mmu_notifier *mn, + pr_debug("map %d+%d (%lx %lx)\n", + map->index, map->count, + map->vma->vm_start, map->vma->vm_end); +- err = unmap_grant_pages(map, /* offset */ 0, map->count); +- WARN_ON(err); ++ unmap_grant_pages(map, /* offset */ 0, map->count); + } + mutex_unlock(&priv->lock); + } +@@ -1113,6 +1165,10 @@ static int gntdev_mmap(struct file *flip, struct vm_area_struct *vma) + goto unlock_out; + } + ++ if (atomic_read(&map->live_grants)) { ++ err = -EAGAIN; ++ goto unlock_out; ++ } + refcount_inc(&map->users); + + vma->vm_ops = &gntdev_vmops; +diff --git a/net/ipv6/seg6_hmac.c b/net/ipv6/seg6_hmac.c +index a886a8f4c0cb3..b801283da28df 100644 +--- a/net/ipv6/seg6_hmac.c ++++ b/net/ipv6/seg6_hmac.c +@@ -415,7 +415,6 @@ int __net_init seg6_hmac_net_init(struct net *net) + + return 0; + } +-EXPORT_SYMBOL(seg6_hmac_net_init); + + void seg6_hmac_exit(void) + { +diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c +index 55c999cbe6e96..420b9fcc10d7d 100644 +--- a/net/ipv6/sit.c ++++ b/net/ipv6/sit.c +@@ -314,9 +314,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t, + kcalloc(cmax, sizeof(*kp), GFP_KERNEL | __GFP_NOWARN) : + NULL; + +- rcu_read_lock(); +- +- ca = t->prl_count < cmax ? t->prl_count : cmax; ++ ca = min(t->prl_count, cmax); + + if (!kp) { + /* We don't try hard to allocate much memory for +@@ -331,7 +329,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t, + } + } + +- c = 0; ++ rcu_read_lock(); + for_each_prl_rcu(t->prl) { + if (c >= cmax) + break; +@@ -343,7 +341,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t, + if (kprl.addr != htonl(INADDR_ANY)) + break; + } +-out: ++ + rcu_read_unlock(); + + len = sizeof(*kp) * c; +@@ -352,7 +350,7 @@ out: + ret = -EFAULT; + + kfree(kp); +- ++out: + return ret; + } + +diff --git a/net/netfilter/nft_set_hash.c b/net/netfilter/nft_set_hash.c +index dbc4ed643b4bc..0b8510a4185da 100644 +--- a/net/netfilter/nft_set_hash.c ++++ b/net/netfilter/nft_set_hash.c +@@ -145,6 +145,7 @@ static bool nft_rhash_update(struct nft_set *set, const u32 *key, + /* Another cpu may race to insert the element with the same key */ + if (prev) { + nft_set_elem_destroy(set, he, true); ++ atomic_dec(&set->nelems); + he = prev; + } + +@@ -154,6 +155,7 @@ out: + + err2: + nft_set_elem_destroy(set, he, true); ++ atomic_dec(&set->nelems); + err1: + return false; + } +diff --git a/net/rose/rose_timer.c b/net/rose/rose_timer.c +index 74555fb956154..cede9d0ceff8b 100644 +--- a/net/rose/rose_timer.c ++++ b/net/rose/rose_timer.c +@@ -34,89 +34,89 @@ static void rose_idletimer_expiry(struct timer_list *); + + void rose_start_heartbeat(struct sock *sk) + { +- del_timer(&sk->sk_timer); ++ sk_stop_timer(sk, &sk->sk_timer); + + sk->sk_timer.function = rose_heartbeat_expiry; + sk->sk_timer.expires = jiffies + 5 * HZ; + +- add_timer(&sk->sk_timer); ++ sk_reset_timer(sk, &sk->sk_timer, sk->sk_timer.expires); + } + + void rose_start_t1timer(struct sock *sk) + { + struct rose_sock *rose = rose_sk(sk); + +- del_timer(&rose->timer); ++ sk_stop_timer(sk, &rose->timer); + + rose->timer.function = rose_timer_expiry; + rose->timer.expires = jiffies + rose->t1; + +- add_timer(&rose->timer); ++ sk_reset_timer(sk, &rose->timer, rose->timer.expires); + } + + void rose_start_t2timer(struct sock *sk) + { + struct rose_sock *rose = rose_sk(sk); + +- del_timer(&rose->timer); ++ sk_stop_timer(sk, &rose->timer); + + rose->timer.function = rose_timer_expiry; + rose->timer.expires = jiffies + rose->t2; + +- add_timer(&rose->timer); ++ sk_reset_timer(sk, &rose->timer, rose->timer.expires); + } + + void rose_start_t3timer(struct sock *sk) + { + struct rose_sock *rose = rose_sk(sk); + +- del_timer(&rose->timer); ++ sk_stop_timer(sk, &rose->timer); + + rose->timer.function = rose_timer_expiry; + rose->timer.expires = jiffies + rose->t3; + +- add_timer(&rose->timer); ++ sk_reset_timer(sk, &rose->timer, rose->timer.expires); + } + + void rose_start_hbtimer(struct sock *sk) + { + struct rose_sock *rose = rose_sk(sk); + +- del_timer(&rose->timer); ++ sk_stop_timer(sk, &rose->timer); + + rose->timer.function = rose_timer_expiry; + rose->timer.expires = jiffies + rose->hb; + +- add_timer(&rose->timer); ++ sk_reset_timer(sk, &rose->timer, rose->timer.expires); + } + + void rose_start_idletimer(struct sock *sk) + { + struct rose_sock *rose = rose_sk(sk); + +- del_timer(&rose->idletimer); ++ sk_stop_timer(sk, &rose->idletimer); + + if (rose->idle > 0) { + rose->idletimer.function = rose_idletimer_expiry; + rose->idletimer.expires = jiffies + rose->idle; + +- add_timer(&rose->idletimer); ++ sk_reset_timer(sk, &rose->idletimer, rose->idletimer.expires); + } + } + + void rose_stop_heartbeat(struct sock *sk) + { +- del_timer(&sk->sk_timer); ++ sk_stop_timer(sk, &sk->sk_timer); + } + + void rose_stop_timer(struct sock *sk) + { +- del_timer(&rose_sk(sk)->timer); ++ sk_stop_timer(sk, &rose_sk(sk)->timer); + } + + void rose_stop_idletimer(struct sock *sk) + { +- del_timer(&rose_sk(sk)->idletimer); ++ sk_stop_timer(sk, &rose_sk(sk)->idletimer); + } + + static void rose_heartbeat_expiry(struct timer_list *t) +@@ -133,6 +133,7 @@ static void rose_heartbeat_expiry(struct timer_list *t) + (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) { + bh_unlock_sock(sk); + rose_destroy_socket(sk); ++ sock_put(sk); + return; + } + break; +@@ -155,6 +156,7 @@ static void rose_heartbeat_expiry(struct timer_list *t) + + rose_start_heartbeat(sk); + bh_unlock_sock(sk); ++ sock_put(sk); + } + + static void rose_timer_expiry(struct timer_list *t) +@@ -184,6 +186,7 @@ static void rose_timer_expiry(struct timer_list *t) + break; + } + bh_unlock_sock(sk); ++ sock_put(sk); + } + + static void rose_idletimer_expiry(struct timer_list *t) +@@ -208,4 +211,5 @@ static void rose_idletimer_expiry(struct timer_list *t) + sock_set_flag(sk, SOCK_DEAD); + } + bh_unlock_sock(sk); ++ sock_put(sk); + } +diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c +index 34596d0e4bdeb..7459180e992bd 100644 +--- a/net/sunrpc/xdr.c ++++ b/net/sunrpc/xdr.c +@@ -544,7 +544,7 @@ static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr, + */ + xdr->p = (void *)p + frag2bytes; + space_left = xdr->buf->buflen - xdr->buf->len; +- if (space_left - nbytes >= PAGE_SIZE) ++ if (space_left - frag1bytes >= PAGE_SIZE) + xdr->end = (void *)p + PAGE_SIZE; + else + xdr->end = (void *)p + space_left - frag1bytes; +diff --git a/tools/testing/selftests/net/udpgso_bench.sh b/tools/testing/selftests/net/udpgso_bench.sh +index 99e537ab5ad9a..dd2f621ca3f92 100755 +--- a/tools/testing/selftests/net/udpgso_bench.sh ++++ b/tools/testing/selftests/net/udpgso_bench.sh +@@ -57,7 +57,7 @@ run_all() { + run_udp "${ipv4_args}" + + echo "ipv6" +- run_tcp "${ipv4_args}" ++ run_tcp "${ipv6_args}" + run_udp "${ipv6_args}" + } +
