INFO: task syz-executor.0:21577 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27896 pid:21577 ppid: 6554 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9877
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:2852
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: 0033:0x7fc09d0d8af9
RSP: 002b:00007fc09c02d188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 00000000000000ae RBX: 00007fc09d1ec028 RCX: 00007fc09d0d8af9
RDX: 0000000000000083 RSI: 00000000000000ae RDI: 0000000000000003
RBP: 00007fc09d132ff7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc09d71fb2f R14: 00007fc09c02d300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by systemd-journal/2963:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
1 lock held by in:imklog/6225:
#0: ffff88801d8cad70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:994
2 locks held by agetty/6455:
#0: ffff88801bd67098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90001b1c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-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:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
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: 2963 Comm: systemd-journal Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:refcount_dec_not_one+0x0/0x1e0 lib/refcount.c:75
Code: fe ff ff e8 d2 e3 9c fd 48 c7 c7 c0 d2 04 8a c6 05 47 e3 a1 09 01 e8 9a d9 25 05 0f 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 <41> 56 41 55 41 54 55 48 bd 00 00 00 00 00 fc ff df 53 48 89 fb 48
RSP: 0018:ffffc90001f4fd40 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff920003e9fb0 RCX: 0000000000000000
RDX: ffff88807b3ad700 RSI: ffffffff83dacbba RDI: ffffffff8ba415a0
RBP: ffffffff8ba415a0 R08: 0000000000000001 R09: 000000008ba50e00
R10: ffffffff814e7edf R11: 0000000000000000 R12: ffffffff8ba50e00
R13: ffffc90001f4fda0 R14: ffffffff8ba416c0 R15: 0000000000000000
FS: 00007f1a5a3eb8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a57961000 CR3: 000000001b846000 CR4: 00000000003506e0
Call Trace:
refcount_dec_and_lock_irqsave+0x22/0x1b0 lib/refcount.c:175
free_uid+0x7e/0x1f0 kernel/user.c:185
put_cred_rcu+0x245/0x520 kernel/cred.c:122
__put_cred+0x1de/0x250 kernel/cred.c:151
put_cred include/linux/cred.h:288 [inline]
put_cred include/linux/cred.h:281 [inline]
revert_creds+0x1a8/0x1f0 kernel/cred.c:608
do_faccessat+0x2e7/0x850 fs/open.c:462
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: 0033:0x7f1a596a69c7
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:00007ffc560c0048 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffc560c3070 RCX: 00007f1a596a69c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000558574cb29a3
RBP: 00007ffc560c0190 R08: 0000558574ca83e5 R09: 0000000000000018
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00005585757d78a0 R15: 00007ffc560c0680
----------------
Code disassembly (best guess), 3 bytes skipped:
0: e8 d2 e3 9c fd callq 0xfd9ce3d7
5: 48 c7 c7 c0 d2 04 8a mov $0xffffffff8a04d2c0,%rdi
c: c6 05 47 e3 a1 09 01 movb $0x1,0x9a1e347(%rip) # 0x9a1e35a
13: e8 9a d9 25 05 callq 0x525d9b2
18: 0f 0b ud2
1a: e9 af fe ff ff jmpq 0xfffffece
1f: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
26: 00
* 27: 41 56 push %r14 <-- trapping instruction
29: 41 55 push %r13
2b: 41 54 push %r12
2d: 55 push %rbp
2e: 48 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%rbp
35: fc ff df
38: 53 push %rbx
39: 48 89 fb mov %rdi,%rbx
3c: 48 rex.W