On Tue, Feb 28, 2017 at 7:26 AM, Dmitry Vyukov <dvyu...@google.com> wrote: > Hello, > > I've got the following WARNING while running syzkaller fuzzer: > > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 9197 at kernel/sched/core.c:6149 > __might_sleep+0x149/0x1a0 kernel/sched/core.c:6144 > do not call blocking ops when !TASK_RUNNING; state=1 set at > [<ffffffff813fa422>] prepare_to_wait+0x182/0x530 > kernel/sched/wait.c:178 > Kernel panic - not syncing: panic_on_warn set ... > > CPU: 0 PID: 9197 Comm: syz-executor2 Not tainted 4.10.0+ #54 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:15 [inline] > dump_stack+0x292/0x398 lib/dump_stack.c:51 > panic+0x1cb/0x3a9 kernel/panic.c:179 > __warn+0x1c4/0x1e0 kernel/panic.c:540 > warn_slowpath_fmt+0xc5/0x110 kernel/panic.c:563 > __might_sleep+0x149/0x1a0 kernel/sched/core.c:6144 > slab_pre_alloc_hook mm/slab.h:432 [inline] > slab_alloc_node mm/slub.c:2644 [inline] > kmem_cache_alloc_node+0x14a/0x280 mm/slub.c:2754 > __alloc_skb+0x10f/0x770 net/core/skbuff.c:219 > alloc_skb include/linux/skbuff.h:932 [inline] > alloc_tx net/atm/common.c:75 [inline] > vcc_sendmsg+0x5e8/0x1010 net/atm/common.c:609 > sock_sendmsg_nosec net/socket.c:633 [inline] > sock_sendmsg+0xca/0x110 net/socket.c:643 > ___sys_sendmsg+0x9d2/0xae0 net/socket.c:1985 > __sys_sendmsg+0x138/0x320 net/socket.c:2019 > SYSC_sendmsg net/socket.c:2030 [inline] > SyS_sendmsg+0x2d/0x50 net/socket.c:2026 > entry_SYSCALL_64_fastpath+0x1f/0xc2 > RIP: 0033:0x4458b9 > RSP: 002b:00007f20dd37ab58 EFLAGS: 00000286 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004458b9 > RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 > RBP: 00000000006e1af0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000708000 > R13: 0000000000000005 R14: 0000000020000ff8 R15: 0000000000000008 > > On commit 86292b33d4b79ee03e2f43ea0381ef85f077c760
Looks the typical pattern for which Cong sent various patches. like "inet: fix sleeping inside inet_wait_for_connect()"
