commit: 4e6b5710da1593a953a026d138cc230c70ffdeda Author: Mike Pagano <mpagano <AT> gentoo <DOT> org> AuthorDate: Thu Jul 7 16:20:15 2022 +0000 Commit: Mike Pagano <mpagano <AT> gentoo <DOT> org> CommitDate: Thu Jul 7 16:20:15 2022 +0000 URL: https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=4e6b5710
Linux patch 4.9.322 Signed-off-by: Mike Pagano <mpagano <AT> gentoo.org> 0000_README | 4 + 1321_linux-4.9.322.patch | 1491 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1495 insertions(+) diff --git a/0000_README b/0000_README index 18d626e1..bdddf20d 100644 --- a/0000_README +++ b/0000_README @@ -1327,6 +1327,10 @@ Patch: 1320_linux-4.9.321.patch From: http://www.kernel.org Desc: Linux 4.9.321 +Patch: 1321_linux-4.9.322.patch +From: http://www.kernel.org +Desc: Linux 4.9.322 + 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/1321_linux-4.9.322.patch b/1321_linux-4.9.322.patch new file mode 100644 index 00000000..b17e8756 --- /dev/null +++ b/1321_linux-4.9.322.patch @@ -0,0 +1,1491 @@ +diff --git a/Makefile b/Makefile +index 4b9b412d5fb82..bd4c898a9940e 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,6 +1,6 @@ + VERSION = 4 + PATCHLEVEL = 9 +-SUBLEVEL = 321 ++SUBLEVEL = 322 + EXTRAVERSION = + NAME = Roaring Lionus + +diff --git a/arch/arm/xen/p2m.c b/arch/arm/xen/p2m.c +index b4ec8d1b0befd..dc8f41deea1e1 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/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h +index b7067590f15c9..8cb3c929641af 100644 +--- a/arch/powerpc/include/asm/ppc-opcode.h ++++ b/arch/powerpc/include/asm/ppc-opcode.h +@@ -134,6 +134,7 @@ + #define PPC_INST_COPY 0x7c00060c + #define PPC_INST_COPY_FIRST 0x7c20060c + #define PPC_INST_CP_ABORT 0x7c00068c ++#define PPC_INST_DARN 0x7c0005e6 + #define PPC_INST_DCBA 0x7c0005ec + #define PPC_INST_DCBA_MASK 0xfc0007fe + #define PPC_INST_DCBAL 0x7c2005ec +@@ -328,6 +329,9 @@ + + /* Deal with instructions that older assemblers aren't aware of */ + #define PPC_CP_ABORT stringify_in_c(.long PPC_INST_CP_ABORT) ++#define PPC_DARN(t, l) stringify_in_c(.long PPC_INST_DARN | \ ++ ___PPC_RT(t) | \ ++ (((l) & 0x3) << 16)) + #define PPC_DCBAL(a, b) stringify_in_c(.long PPC_INST_DCBAL | \ + __PPC_RA(a) | __PPC_RB(b)) + #define PPC_DCBZL(a, b) stringify_in_c(.long PPC_INST_DCBZL | \ +diff --git a/arch/powerpc/platforms/powernv/powernv.h b/arch/powerpc/platforms/powernv/powernv.h +index da7c843ac7f15..e98e14a5db4dd 100644 +--- a/arch/powerpc/platforms/powernv/powernv.h ++++ b/arch/powerpc/platforms/powernv/powernv.h +@@ -27,4 +27,6 @@ extern void opal_event_shutdown(void); + + bool cpu_core_split_required(void); + ++void pnv_rng_init(void); ++ + #endif /* _POWERNV_H */ +diff --git a/arch/powerpc/platforms/powernv/rng.c b/arch/powerpc/platforms/powernv/rng.c +index 5dcbdea1afac0..dc13ed3f6c2b2 100644 +--- a/arch/powerpc/platforms/powernv/rng.c ++++ b/arch/powerpc/platforms/powernv/rng.c +@@ -16,11 +16,14 @@ + #include <linux/slab.h> + #include <linux/smp.h> + #include <asm/archrandom.h> ++#include <asm/cputable.h> + #include <asm/io.h> + #include <asm/prom.h> + #include <asm/machdep.h> + #include <asm/smp.h> ++#include "powernv.h" + ++#define DARN_ERR 0xFFFFFFFFFFFFFFFFul + + struct powernv_rng { + void __iomem *regs; +@@ -30,7 +33,6 @@ struct powernv_rng { + + static DEFINE_PER_CPU(struct powernv_rng *, powernv_rng); + +- + int powernv_hwrng_present(void) + { + struct powernv_rng *rng; +@@ -45,7 +47,11 @@ static unsigned long rng_whiten(struct powernv_rng *rng, unsigned long val) + unsigned long parity; + + /* Calculate the parity of the value */ +- asm ("popcntd %0,%1" : "=r" (parity) : "r" (val)); ++ asm (".machine push; \ ++ .machine power7; \ ++ popcntd %0,%1; \ ++ .machine pop;" ++ : "=r" (parity) : "r" (val)); + + /* xor our value with the previous mask */ + val ^= rng->mask; +@@ -67,6 +73,38 @@ int powernv_get_random_real_mode(unsigned long *v) + return 1; + } + ++static int powernv_get_random_darn(unsigned long *v) ++{ ++ unsigned long val; ++ ++ /* Using DARN with L=1 - 64-bit conditioned random number */ ++ asm volatile(PPC_DARN(%0, 1) : "=r"(val)); ++ ++ if (val == DARN_ERR) ++ return 0; ++ ++ *v = val; ++ ++ return 1; ++} ++ ++static int __init initialise_darn(void) ++{ ++ unsigned long val; ++ int i; ++ ++ if (!cpu_has_feature(CPU_FTR_ARCH_300)) ++ return -ENODEV; ++ ++ for (i = 0; i < 10; i++) { ++ if (powernv_get_random_darn(&val)) { ++ ppc_md.get_random_seed = powernv_get_random_darn; ++ return 0; ++ } ++ } ++ return -EIO; ++} ++ + int powernv_get_random_long(unsigned long *v) + { + struct powernv_rng *rng; +@@ -88,7 +126,7 @@ static __init void rng_init_per_cpu(struct powernv_rng *rng, + + chip_id = of_get_ibm_chip_id(dn); + if (chip_id == -1) +- pr_warn("No ibm,chip-id found for %s.\n", dn->full_name); ++ pr_warn("No ibm,chip-id found for %pOF.\n", dn); + + for_each_possible_cpu(cpu) { + if (per_cpu(powernv_rng, cpu) == NULL || +@@ -126,30 +164,55 @@ static __init int rng_create(struct device_node *dn) + + rng_init_per_cpu(rng, dn); + +- pr_info_once("Registering arch random hook.\n"); +- + ppc_md.get_random_seed = powernv_get_random_long; + + return 0; + } + +-static __init int rng_init(void) ++static int __init pnv_get_random_long_early(unsigned long *v) + { + struct device_node *dn; +- int rc; ++ ++ if (!slab_is_available()) ++ return 0; ++ ++ if (cmpxchg(&ppc_md.get_random_seed, pnv_get_random_long_early, ++ NULL) != pnv_get_random_long_early) ++ return 0; + + for_each_compatible_node(dn, NULL, "ibm,power-rng") { +- rc = rng_create(dn); +- if (rc) { +- pr_err("Failed creating rng for %s (%d).\n", +- dn->full_name, rc); ++ if (rng_create(dn)) + continue; +- } +- + /* Create devices for hwrng driver */ + of_platform_device_create(dn, NULL, NULL); + } + ++ if (!ppc_md.get_random_seed) ++ return 0; ++ return ppc_md.get_random_seed(v); ++} ++ ++void __init pnv_rng_init(void) ++{ ++ struct device_node *dn; ++ ++ /* Prefer darn over the rest. */ ++ if (!initialise_darn()) ++ return; ++ ++ dn = of_find_compatible_node(NULL, NULL, "ibm,power-rng"); ++ if (dn) ++ ppc_md.get_random_seed = pnv_get_random_long_early; ++ ++ of_node_put(dn); ++} ++ ++static int __init pnv_rng_late_init(void) ++{ ++ unsigned long v; ++ /* In case it wasn't called during init for some other reason. */ ++ if (ppc_md.get_random_seed == pnv_get_random_long_early) ++ pnv_get_random_long_early(&v); + return 0; + } +-machine_subsys_initcall(powernv, rng_init); ++machine_subsys_initcall(powernv, pnv_rng_late_init); +diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c +index b77d5eed95205..e97b714d30d76 100644 +--- a/arch/powerpc/platforms/powernv/setup.c ++++ b/arch/powerpc/platforms/powernv/setup.c +@@ -168,6 +168,8 @@ static void __init pnv_setup_arch(void) + powersave_nap = 1; + + /* XXX PMCS */ ++ ++ pnv_rng_init(); + } + + static void __init pnv_init(void) +diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c +index 17ea0ba50278d..9c907c1a4a1c0 100644 +--- a/drivers/block/xen-blkfront.c ++++ b/drivers/block/xen-blkfront.c +@@ -144,6 +144,10 @@ static unsigned int xen_blkif_max_ring_order; + module_param_named(max_ring_page_order, xen_blkif_max_ring_order, int, S_IRUGO); + 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) + +@@ -206,6 +210,7 @@ struct blkfront_info + unsigned int discard_granularity; + unsigned int discard_alignment; + unsigned int feature_persistent:1; ++ unsigned int bounce:1; + /* Number of 4KB segments handled */ + unsigned int max_indirect_segments; + int is_ready; +@@ -296,8 +301,8 @@ 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; +@@ -316,7 +321,7 @@ 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--; +@@ -362,7 +367,7 @@ 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 */ +@@ -386,7 +391,7 @@ 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 */ +@@ -701,7 +706,7 @@ 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, + }; + + /* +@@ -1015,11 +1020,12 @@ 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) +@@ -1254,7 +1260,7 @@ 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); +@@ -1271,7 +1277,7 @@ static void blkif_free_ring(struct blkfront_ring_info *rinfo) + continue; + + rinfo->persistent_gnts_c--; +- if (info->feature_persistent) ++ if (info->bounce) + __free_page(persistent_gnt->page); + kfree(persistent_gnt); + } +@@ -1291,7 +1297,7 @@ 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); + } +@@ -1481,7 +1487,7 @@ 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); + +@@ -1540,7 +1546,7 @@ 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); + } +@@ -1729,7 +1735,7 @@ 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; +@@ -1822,6 +1828,13 @@ static int talk_to_blkback(struct xenbus_device *dev, + int err; + unsigned int i, max_page_order = 0; + unsigned int ring_page_order = 0; ++ unsigned int trusted; ++ ++ /* Check if backend is trusted. */ ++ err = xenbus_scanf(XBT_NIL, dev->nodename, "trusted", "%u", &trusted); ++ if (err < 0) ++ trusted = 1; ++ info->bounce = !xen_blkif_trusted || !trusted; + + err = xenbus_scanf(XBT_NIL, info->xbdev->otherend, + "max-ring-page-order", "%u", &max_page_order); +@@ -2301,17 +2314,18 @@ 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_NOIO); ++ struct page *indirect_page = alloc_page(GFP_NOIO | ++ __GFP_ZERO); + if (!indirect_page) + goto out_of_memory; + list_add(&indirect_page->lru, &rinfo->indirect_pages); +@@ -2409,6 +2423,8 @@ static void blkfront_gather_backend_features(struct blkfront_info *info) + info->feature_persistent = 0; + else + info->feature_persistent = persistent; ++ if (info->feature_persistent) ++ info->bounce = true; + + err = xenbus_scanf(XBT_NIL, info->xbdev->otherend, + "feature-max-indirect-segments", "%u", +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/md/raid5.c b/drivers/md/raid5.c +index 1e9321410bbb6..b396e78b1b6d3 100644 +--- a/drivers/md/raid5.c ++++ b/drivers/md/raid5.c +@@ -7322,6 +7322,7 @@ 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 578d8e12e2d21..8ec0671f97113 100644 +--- a/drivers/net/bonding/bond_3ad.c ++++ b/drivers/net/bonding/bond_3ad.c +@@ -2163,7 +2163,8 @@ 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 1f8fbd7776fb4..df81b525156fe 100644 +--- a/drivers/net/bonding/bond_alb.c ++++ b/drivers/net/bonding/bond_alb.c +@@ -1264,12 +1264,12 @@ 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 b306210b02b7b..b91c7c7b253c6 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/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c +index 738d10fc595c0..48938d00ff7e8 100644 +--- a/drivers/net/usb/ax88179_178a.c ++++ b/drivers/net/usb/ax88179_178a.c +@@ -1373,6 +1373,42 @@ 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); +@@ -1387,51 +1423,66 @@ 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 003c53a5bb336..db37cf9281e1b 100644 +--- a/drivers/net/usb/qmi_wwan.c ++++ b/drivers/net/usb/qmi_wwan.c +@@ -928,10 +928,16 @@ 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 */ + {QMI_QUIRK_SET_DTR(0x1bc7, 0x1201, 2)}, /* Telit LE920, LE920A4 */ ++ {QMI_QUIRK_SET_DTR(0x1bc7, 0x1230, 2)}, /* Telit LE910Cx */ ++ {QMI_QUIRK_SET_DTR(0x1bc7, 0x1260, 2)}, /* Telit LE910Cx */ ++ {QMI_QUIRK_SET_DTR(0x1bc7, 0x1261, 2)}, /* Telit LE910Cx */ ++ {QMI_QUIRK_SET_DTR(0x1bc7, 0x1900, 1)}, /* Telit LN940 series */ + {QMI_FIXED_INTF(0x1c9e, 0x9801, 3)}, /* Telewell TW-3G HSPA+ */ + {QMI_FIXED_INTF(0x1c9e, 0x9803, 4)}, /* Telewell TW-3G HSPA+ */ + {QMI_FIXED_INTF(0x1c9e, 0x9b01, 3)}, /* XS Stick W100-2 from 4G Systems */ +diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c +index 6a004742ec71a..4b7a9672d92b7 100644 +--- a/drivers/net/usb/usbnet.c ++++ b/drivers/net/usb/usbnet.c +@@ -1951,8 +1951,8 @@ static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, + " value=0x%04x index=0x%04x size=%d\n", + cmd, reqtype, value, index, size); + +- if (data) { +- buf = kmalloc(size, GFP_KERNEL); ++ if (size) { ++ buf = kmalloc(size, GFP_NOIO); + if (!buf) + goto out; + } +@@ -1960,8 +1960,13 @@ static int __usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, + err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), + cmd, reqtype, value, index, buf, size, + USB_CTRL_GET_TIMEOUT); +- if (err > 0 && err <= size) +- memcpy(data, buf, err); ++ if (err > 0 && err <= size) { ++ if (data) ++ memcpy(data, buf, err); ++ else ++ netdev_dbg(dev->net, ++ "Huh? Data requested but thrown away.\n"); ++ } + kfree(buf); + out: + return err; +@@ -1979,10 +1984,16 @@ 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 { ++ if (size) { ++ WARN_ON_ONCE(1); ++ err = -EINVAL; ++ goto out; ++ } ++ } + + err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), + cmd, reqtype, value, index, buf, size, +diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c +index 82dcd44b3e5e2..cae036f5299a8 100644 +--- a/drivers/net/xen-netfront.c ++++ b/drivers/net/xen-netfront.c +@@ -62,6 +62,10 @@ 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; +@@ -162,6 +166,9 @@ 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; + }; + +@@ -260,7 +267,7 @@ 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; +@@ -591,6 +598,34 @@ 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 int xennet_start_xmit(struct sk_buff *skb, struct net_device *dev) +@@ -643,9 +678,13 @@ static int 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_kfree_skb_any(skb); +@@ -1962,9 +2001,16 @@ static int talk_to_netback(struct xenbus_device *dev, + unsigned int max_queues = 0; + struct netfront_queue *queue = NULL; + unsigned int num_queues = 1; ++ unsigned int trusted; + + info->netdev->irq = 0; + ++ /* Check if backend is trusted. */ ++ err = xenbus_scanf(XBT_NIL, dev->nodename, "trusted", "%u", &trusted); ++ if (err < 0) ++ trusted = 1; ++ info->bounce = !xennet_trusted || !trusted; ++ + /* Check if backend supports multiple queues */ + err = xenbus_scanf(XBT_NIL, info->xbdev->otherend, + "multi-queue-max-queues", "%u", &max_queues); +@@ -2129,6 +2175,9 @@ 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 78b7aa835c81d..bb546cabe8090 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 fc8e78a29d77a..d66c83efdd7d5 100644 +--- a/drivers/nfc/nfcmrvl/spi.c ++++ b/drivers/nfc/nfcmrvl/spi.c +@@ -130,9 +130,9 @@ 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 7eab97585f22b..a4f1a981e2dd1 100644 +--- a/drivers/nfc/nxp-nci/i2c.c ++++ b/drivers/nfc/nxp-nci/i2c.c +@@ -180,6 +180,9 @@ static int nxp_nci_i2c_nci_read(struct nxp_nci_i2c_phy *phy, + memcpy(skb_put(*skb, NCI_CTRL_HDR_SIZE), (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/xen/gntdev.c b/drivers/xen/gntdev.c +index 69d59102ff1be..2c3248e71e9c1 100644 +--- a/drivers/xen/gntdev.c ++++ b/drivers/xen/gntdev.c +@@ -57,6 +57,7 @@ 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 + +@@ -92,11 +93,16 @@ struct 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; ++ /* Number of live grants */ ++ atomic_t live_grants; ++ /* Needed to avoid allocation in unmap_grant_pages */ ++ struct gntab_unmap_queue_data unmap_data; + }; + +-static int unmap_grant_pages(struct grant_map *map, int offset, int pages); ++static void unmap_grant_pages(struct grant_map *map, int offset, int pages); + + /* ------------------------------------------------------------------ */ + +@@ -127,6 +133,7 @@ static void gntdev_free_map(struct grant_map *map) + kfree(map->unmap_ops); + kfree(map->kmap_ops); + kfree(map->kunmap_ops); ++ kfree(map->being_removed); + kfree(map); + } + +@@ -145,12 +152,15 @@ static struct 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; + + if (gnttab_alloc_pages(count, add->pages)) +@@ -215,6 +225,34 @@ static void gntdev_put_map(struct gntdev_priv *priv, struct 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. ++ */ ++ atomic_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 (!atomic_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); +@@ -272,6 +310,7 @@ static int set_grant_ptes_as_special(pte_t *pte, pgtable_t token, + + static int map_grant_pages(struct grant_map *map) + { ++ size_t alloced = 0; + int i, err = 0; + + if (!use_ptemod) { +@@ -320,85 +359,107 @@ static int map_grant_pages(struct 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 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 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 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; ++ atomic_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 grant_map *map, int offset, int pages) ++static void unmap_grant_pages(struct 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; + } + + /* ------------------------------------------------------------------ */ +@@ -454,7 +515,6 @@ static void unmap_if_in_range(struct grant_map *map, + unsigned long start, unsigned long end) + { + unsigned long mstart, mend; +- int err; + + if (!map->vma) + return; +@@ -468,10 +528,9 @@ static void unmap_if_in_range(struct 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); + } + + static void mn_invl_range_start(struct mmu_notifier *mn, +@@ -503,7 +562,6 @@ static void mn_release(struct mmu_notifier *mn, + { + struct gntdev_priv *priv = container_of(mn, struct gntdev_priv, mn); + struct grant_map *map; +- int err; + + mutex_lock(&priv->lock); + list_for_each_entry(map, &priv->maps, next) { +@@ -512,8 +570,7 @@ 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) +@@ -521,8 +578,7 @@ 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); + } +@@ -1012,6 +1068,10 @@ 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; ++ } + atomic_inc(&map->users); + + vma->vm_ops = &gntdev_vmops; +diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h +index dab550cf29c12..827d69d66394c 100644 +--- a/include/linux/skbuff.h ++++ b/include/linux/skbuff.h +@@ -975,6 +975,7 @@ static inline struct sk_buff *alloc_skb_head(gfp_t priority) + struct sk_buff *skb_morph(struct sk_buff *dst, struct sk_buff *src); + int skb_copy_ubufs(struct sk_buff *skb, gfp_t gfp_mask); + struct sk_buff *skb_clone(struct sk_buff *skb, gfp_t priority); ++void skb_copy_header(struct sk_buff *new, const struct sk_buff *old); + struct sk_buff *skb_copy(const struct sk_buff *skb, gfp_t priority); + struct sk_buff *__pskb_copy_fclone(struct sk_buff *skb, int headroom, + gfp_t gfp_mask, bool fclone); +diff --git a/net/core/skbuff.c b/net/core/skbuff.c +index 41d328a93790f..22b216629f9bc 100644 +--- a/net/core/skbuff.c ++++ b/net/core/skbuff.c +@@ -1071,7 +1071,7 @@ static void skb_headers_offset_update(struct sk_buff *skb, int off) + skb->inner_mac_header += off; + } + +-static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old) ++void skb_copy_header(struct sk_buff *new, const struct sk_buff *old) + { + __copy_skb_header(new, old); + +@@ -1079,6 +1079,7 @@ static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old) + skb_shinfo(new)->gso_segs = skb_shinfo(old)->gso_segs; + skb_shinfo(new)->gso_type = skb_shinfo(old)->gso_type; + } ++EXPORT_SYMBOL(skb_copy_header); + + static inline int skb_alloc_rx_flag(const struct sk_buff *skb) + { +@@ -1122,7 +1123,7 @@ struct sk_buff *skb_copy(const struct sk_buff *skb, gfp_t gfp_mask) + if (skb_copy_bits(skb, -headerlen, n->head, headerlen + skb->len)) + BUG(); + +- copy_skb_header(n, skb); ++ skb_copy_header(n, skb); + return n; + } + EXPORT_SYMBOL(skb_copy); +@@ -1185,7 +1186,7 @@ struct sk_buff *__pskb_copy_fclone(struct sk_buff *skb, int headroom, + skb_clone_fraglist(n); + } + +- copy_skb_header(n, skb); ++ skb_copy_header(n, skb); + out: + return n; + } +@@ -1356,7 +1357,7 @@ struct sk_buff *skb_copy_expand(const struct sk_buff *skb, + skb->len + head_copy_len)) + BUG(); + +- copy_skb_header(n, skb); ++ skb_copy_header(n, skb); + + skb_headers_offset_update(n, newheadroom - oldheadroom); + +diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c +index 07e545fd2a3d8..560aedccfa1ac 100644 +--- a/net/ipv6/sit.c ++++ b/net/ipv6/sit.c +@@ -308,9 +308,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t, + kcalloc(cmax, sizeof(*kp), GFP_KERNEL) : + 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 +@@ -325,7 +323,7 @@ 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; +@@ -337,7 +335,7 @@ 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; +@@ -346,7 +344,7 @@ 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 a3dface3e6e68..8a41596846413 100644 +--- a/net/netfilter/nft_set_hash.c ++++ b/net/netfilter/nft_set_hash.c +@@ -121,6 +121,7 @@ static bool nft_hash_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; + } + +@@ -130,6 +131,7 @@ 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 bc5469d6d9cb5..a7b3448969361 100644 +--- a/net/rose/rose_timer.c ++++ b/net/rose/rose_timer.c +@@ -34,95 +34,95 @@ static void rose_idletimer_expiry(unsigned long); + + void rose_start_heartbeat(struct sock *sk) + { +- del_timer(&sk->sk_timer); ++ sk_stop_timer(sk, &sk->sk_timer); + + sk->sk_timer.data = (unsigned long)sk; + 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.data = (unsigned long)sk; + 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.data = (unsigned long)sk; + 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.data = (unsigned long)sk; + 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.data = (unsigned long)sk; + 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->timer); + + if (rose->idle > 0) { + rose->idletimer.data = (unsigned long)sk; + 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(unsigned long param) +@@ -139,6 +139,7 @@ static void rose_heartbeat_expiry(unsigned long param) + (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) { + bh_unlock_sock(sk); + rose_destroy_socket(sk); ++ sock_put(sk); + return; + } + break; +@@ -161,6 +162,7 @@ static void rose_heartbeat_expiry(unsigned long param) + + rose_start_heartbeat(sk); + bh_unlock_sock(sk); ++ sock_put(sk); + } + + static void rose_timer_expiry(unsigned long param) +@@ -190,6 +192,7 @@ static void rose_timer_expiry(unsigned long param) + break; + } + bh_unlock_sock(sk); ++ sock_put(sk); + } + + static void rose_idletimer_expiry(unsigned long param) +@@ -213,4 +216,5 @@ static void rose_idletimer_expiry(unsigned long param) + 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 06b4b76edd9dc..e0b217f3aae98 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;
