INFO: task syz-executor.4:27268 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28592 pid:27268 ppid: 6981 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6250
schedule+0xd2/0x260 kernel/sched/core.c:6323
io_uring_cancel_generic+0x53d/0x690 fs/io_uring.c:9850
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x263/0x2a20 kernel/exit.c:781
do_group_exit+0x125/0x310 kernel/exit.c:923
get_signal+0x47d/0x21d0 kernel/signal.c:2855
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: 0033:0x7f3ff35fcae7
RSP: 002b:00007f3ff0b51218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 00000000000000ca RBX: 00007f3ff3710028 RCX: 00007f3ff35fcae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3ff3710028
RBP: 00007f3ff3710020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3ff371002c
R13: 00007f3ff3c43b2f R14: 00007f3ff0b51300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b9838e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
2 locks held by in:imklog/6172:
2 locks held by agetty/6402:
#0: ffff8880229f6098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90001aec2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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: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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2922 Comm: systemd-journal Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0xa/0x170 lib/smp_processor_id.c:13
Code: f8 65 48 8b 3c 25 40 70 02 00 e8 01 e7 1a f8 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 41 55 49 89 f5 41 54 55 <48> 89 fd 53 0f 1f 44 00 00 65 44 8b 25 4d f5 c9 76 65 8b 1d be 4f
RSP: 0018:ffffc9000292fe88 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff898c0ba0 RDI: ffffffff89e47d60
RBP: ffffffff8b983820 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff819bf882 R11: 0000000000000000 R12: ffff88807c521d00
R13: ffffffff898c0ba0 R14: 00000000ffffffff R15: 0000000000000000
FS: 00007f6b60f718c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6b5c62d000 CR3: 000000007c127000 CR4: 00000000003526f0
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:433 [inline]
lock_is_held_type+0x63/0x140 kernel/locking/lockdep.c:5667
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_user_exit.constprop.0+0x157/0x220 include/trace/events/context_tracking.h:48
__context_tracking_exit+0xbd/0xe0 kernel/context_tracking.c:161
user_exit_irqoff include/linux/context_tracking.h:47 [inline]
__enter_from_user_mode kernel/entry/common.c:22 [inline]
syscall_enter_from_user_mode+0x4c/0x70 kernel/entry/common.c:104
do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6b60209f17
Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007fff77d36ac8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 000056494e56b1e0 RCX: 00007f6b60209f17
RDX: 0000000000000000 RSI: 00007fff77d36be0 RDI: 000056494e56b1e0
RBP: 00007fff77d36be0 R08: 2d1c5724b76f1d58 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000b6a
R13: 00007fff77d36b88 R14: 00007fff77d36be0 R15: 00007fff77d37178
----------------
Code disassembly (best guess):
0: f8 clc
1: 65 48 8b 3c 25 40 70 mov %gs:0x27040,%rdi
8: 02 00
a: e8 01 e7 1a f8 callq 0xf81ae710
f: eb 99 jmp 0xffffffaa
11: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
16: 0f 0b ud2
18: e9 23 ff ff ff jmpq 0xffffff40
1d: cc int3
1e: cc int3
1f: cc int3
20: 41 56 push %r14
22: 41 55 push %r13
24: 49 89 f5 mov %rsi,%r13
27: 41 54 push %r12
29: 55 push %rbp
* 2a: 48 89 fd mov %rdi,%rbp <-- trapping instruction
2d: 53 push %rbx
2e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
33: 65 44 8b 25 4d f5 c9 mov %gs:0x76c9f54d(%rip),%r12d # 0x76c9f588
3a: 76
3b: 65 gs
3c: 8b .byte 0x8b
3d: 1d .byte 0x1d
3e: be .byte 0xbe
3f: 4f rex.WRXB