INFO: task syz-executor.4:6393 blocked for more than 143 seconds.
Tainted: G W 5.17.0-syzkaller-02237-g1bc191051dca #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:25848 pid: 6393 ppid: 3610 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0x937/0x1090 kernel/sched/core.c:6382
schedule+0xeb/0x1b0 kernel/sched/core.c:6454
schedule_timeout+0xac/0x300 kernel/time/timer.c:1857
do_wait_for_common+0x3ea/0x560 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
io_wq_exit_workers fs/io-wq.c:1264 [inline]
io_wq_put_and_exit+0x5cf/0xc40 fs/io-wq.c:1299
io_uring_clean_tctx+0x103/0x1d5 fs/io_uring.c:10512
io_uring_cancel_generic+0x636/0x661 fs/io_uring.c:10582
io_uring_files_cancel include/linux/io_uring.h:18 [inline]
do_exit+0x156/0x20f0 kernel/exit.c:761
do_group_exit+0x2af/0x2b0 kernel/exit.c:936
get_signal+0x1831/0x2330 kernel/signal.c:2903
arch_do_signal_or_restart+0x9c/0x730 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:149 [inline]
exit_to_user_mode_loop kernel/entry/common.c:187 [inline]
exit_to_user_mode_prepare+0x165/0x200 kernel/entry/common.c:222
__syscall_exit_to_user_mode_work kernel/entry/common.c:304 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:315
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff16ec89049
RSP: 002b:00007ff16fe95218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007ff16ed9bf68 RCX: 00007ff16ec89049
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff16ed9bf68
RBP: 00007ff16ed9bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff16ed9bf6c
R13: 00007ffc894f572f R14: 00007ff16fe95300 R15: 0000000000022000
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Tainted: G W 5.17.0-syzkaller-02237-g1bc191051dca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:369
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2954 Comm: klogd Tainted: G W 5.17.0-syzkaller-02237-g1bc191051dca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0x130a/0x1fc0 arch/x86/kernel/unwind_orc.c:616
Code: 00 00 fc ff df 42 80 3c 30 00 4c 8b 64 24 48 74 08 48 89 df e8 d7 d0 9b 00 48 89 2b 4c 8b 7c 24 18 48 8b 54 24 10 43 8a 04 37 <84> c0 0f 85 5b 08 00 00 8b 84 24 84 00 00 00 41 39 45 00 0f 85 cd
RSP: 0018:ffffc9000b8fefc0 EFLAGS: 00000246
RAX: 1ffff9200171fe00 RBX: ffffc9000b8ff0c0 RCX: 0000000000000000
RDX: ffffc9000b8ff350 RSI: 0000000000000001 RDI: ffffc9000b8ff390
RBP: 1ffffd4000093dfe R08: dffffc0000000000 R09: ffffc9000b8ff0d0
R10: fffff5200171fe1c R11: 0000000000000000 R12: 1ffff9200171fe17
R13: ffffc9000b8ff080 R14: dffffc0000000000 R15: 1ffff9200171fe10
FS: 00007f97e7803800(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e87210488 CR3: 000000007ddcd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:122
save_stack+0xff/0x200 mm/page_owner.c:121
__reset_page_owner+0x51/0x1a0 mm/page_owner.c:142
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1348 [inline]
free_pcp_prepare+0xcbd/0xec0 mm/page_alloc.c:1400
free_unref_page_prepare mm/page_alloc.c:3269 [inline]
free_unref_page+0x7d/0x580 mm/page_alloc.c:3364
do_slab_free mm/slub.c:3511 [inline]
___cache_free+0x117/0x1c0 mm/slub.c:3530
qlist_free_all mm/kasan/quarantine.c:176 [inline]
kasan_quarantine_reduce+0x127/0x190 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:239 [inline]
slab_post_alloc_hook mm/slab.h:749 [inline]
slab_alloc_node mm/slub.c:3230 [inline]
kmem_cache_alloc_node+0x201/0x370 mm/slub.c:3280
__alloc_skb+0xd8/0x5a0 net/core/skbuff.c:414
alloc_skb include/linux/skbuff.h:1158 [inline]
alloc_skb_with_frags+0xac/0x750 net/core/skbuff.c:5956
sock_alloc_send_pskb+0x928/0xa60 net/core/sock.c:2586
unix_dgram_sendmsg+0x60e/0x29e0 net/unix/af_unix.c:1896
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg net/socket.c:725 [inline]
__sys_sendto+0x42e/0x5b0 net/socket.c:2040
__do_sys_sendto net/socket.c:2052 [inline]
__se_sys_sendto net/socket.c:2048 [inline]
__x64_sys_sendto+0xda/0xf0 net/socket.c:2048
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f97e799f0ac
Code: 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 19 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 64 c3 0f 1f 00 55 48 83 ec 20 48 89 54 24 10
RSP: 002b:00007fffc9718f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f97e799f0ac
RDX: 000000000000004a RSI: 000055703c490a30 RDI: 0000000000000003
RBP: 000055703c488910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000001 R14: 00007f97e7b1a77d R15: 00007fffc97190a8
----------------
Code disassembly (best guess), 4 bytes skipped:
0: df 42 80 filds -0x80(%rdx)
3: 3c 30 cmp $0x30,%al
5: 00 4c 8b 64 add %cl,0x64(%rbx,%rcx,4)
9: 24 48 and $0x48,%al
b: 74 08 je 0x15
d: 48 89 df mov %rbx,%rdi
10: e8 d7 d0 9b 00 callq 0x9bd0ec
15: 48 89 2b mov %rbp,(%rbx)
18: 4c 8b 7c 24 18 mov 0x18(%rsp),%r15
1d: 48 8b 54 24 10 mov 0x10(%rsp),%rdx
22: 43 8a 04 37 mov (%r15,%r14,1),%al
* 26: 84 c0 test %al,%al <-- trapping instruction
28: 0f 85 5b 08 00 00 jne 0x889
2e: 8b 84 24 84 00 00 00 mov 0x84(%rsp),%eax
35: 41 39 45 00 cmp %eax,0x0(%r13)
39: 0f .byte 0xf
3a: 85 cd test %ecx,%ebp