INFO: task syz-executor.4:19779 blocked for more than 143 seconds.
Not tainted 5.15.0-next-20211104-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27776 pid:19779 ppid: 6584 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2830
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fdc4e31cae9
RSP: 002b:00007fdc4b892188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000002ff RBX: 00007fdc4e42ff60 RCX: 00007fdc4e31cae9
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000005
RBP: 00007fdc4e376f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8ae9248f R14: 00007fdc4b892300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by in:imklog/6223:
#0: ffff88801e6900f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffffffff8bb72ea8 (syslog_lock){+.+.}-{3:3}, at: is_bpf_text_address+0x0/0x170 kernel/bpf/core.c:695
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-next-20211104-syzkaller #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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2960 Comm: systemd-journal Not tainted 5.15.0-next-20211104-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_next_frame+0x13d1/0x1ce0 arch/x86/kernel/unwind_orc.c:600
Code: 49 c1 e9 03 41 0f b6 0c 09 49 89 f9 41 83 e1 07 44 38 ce 41 0f 9e c1 40 84 f6 40 0f 95 c6 41 84 f1 0f 85 af 06 00 00 83 e0 07 <38> c1 40 0f 9e c6 84 c9 0f 95 c0 40 84 c6 0f 85 98 06 00 00 49 0f
RSP: 0018:ffffc90001b2f578 EFLAGS: 00000202
RAX: 0000000000000007 RBX: 1ffff92000365eb7 RCX: 0000000000000000
RDX: ffffc90001b2f6e0 RSI: 0000000000000000 RDI: ffffffff8e0a40d6
RBP: 0000000000000001 R08: ffffffff8e0a40d4 R09: 0000000000000001
R10: fffff52000365edf R11: 000000000008808a R12: ffffc90001b2f738
R13: ffffc90001b2f6d5 R14: ffffc90001b2f6a0 R15: ffffffff8e0a40d8
FS: 00007fb05bb348c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb0593d3010 CR3: 000000001c5b2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__unwind_start+0x51b/0x800 arch/x86/kernel/unwind_orc.c:712
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x5c/0xe0 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122
save_stack+0x151/0x1e0 mm/page_owner.c:121
__set_page_owner+0x45/0x2d0 mm/page_owner.c:183
prep_new_page mm/page_alloc.c:2418 [inline]
get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4149
__alloc_pages+0x1b2/0x500 mm/page_alloc.c:5369
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
alloc_slab_page mm/slub.c:1793 [inline]
allocate_slab mm/slub.c:1930 [inline]
new_slab+0x32d/0x4a0 mm/slub.c:1993
___slab_alloc+0x918/0xfe0 mm/slub.c:3022
__slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3109
slab_alloc_node mm/slub.c:3200 [inline]
slab_alloc mm/slub.c:3242 [inline]
kmem_cache_alloc+0x35c/0x3a0 mm/slub.c:3247
getname_flags.part.0+0x50/0x4f0 fs/namei.c:138
getname_flags+0x9a/0xe0 include/linux/audit.h:323
user_path_at_empty+0x2b/0x60 fs/namei.c:2800
user_path_at include/linux/namei.h:57 [inline]
do_faccessat+0x127/0x850 fs/open.c:421
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb05adef9c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007fff8fbb1d28 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007fff8fbb4d50 RCX: 00007fb05adef9c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005636d7f9b9a3
RBP: 00007fff8fbb1e70 R08: 00005636d7f913e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00005636d99bf8a0 R15: 00007fff8fbb2360
----------------
Code disassembly (best guess):
0: 49 c1 e9 03 shr $0x3,%r9
4: 41 0f b6 0c 09 movzbl (%r9,%rcx,1),%ecx
9: 49 89 f9 mov %rdi,%r9
c: 41 83 e1 07 and $0x7,%r9d
10: 44 38 ce cmp %r9b,%sil
13: 41 0f 9e c1 setle %r9b
17: 40 84 f6 test %sil,%sil
1a: 40 0f 95 c6 setne %sil
1e: 41 84 f1 test %sil,%r9b
21: 0f 85 af 06 00 00 jne 0x6d6
27: 83 e0 07 and $0x7,%eax
* 2a: 38 c1 cmp %al,%cl <-- trapping instruction
2c: 40 0f 9e c6 setle %sil
30: 84 c9 test %cl,%cl
32: 0f 95 c0 setne %al
35: 40 84 c6 test %al,%sil
38: 0f 85 98 06 00 00 jne 0x6d6
3e: 49 rex.WB
3f: 0f .byte 0xf