INFO: task syz-executor.1:17179 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.1 state:D stack:28280 pid:17179 ppid: 17178 flags:0x00004002
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
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6382
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
__pipe_lock fs/pipe.c:102 [inline]
pipe_release+0x49/0x320 fs/pipe.c:717
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xc14/0x2b40 kernel/exit.c:832
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x21d0 kernel/signal.c:2820
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
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
asm_exc_general_protection+0x1e/0x30 arch/x86/include/asm/idtentry.h:562
RIP: 0033:0x7fcde8d70af1
RSP: 002b:00000000200004c0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fcde8e83f60 RCX: 00007fcde8d70ae9
RDX: 0000000020000540 RSI: 00000000200004c0 RDI: 0000000000000200
RBP: 00007fcde8dcaf25 R08: 00000000200005c0 R09: 0000000000000000
R10: 0000000020000580 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffffa1483af R14: 00007fcde62e6300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8b983a20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6461
1 lock held by in:imklog/6168:
1 lock held by syz-executor.0/7183:
#0: ffff888019433468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock_nested fs/pipe.c:81 [inline]
#0: ffff888019433468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock+0x5a/0x70 fs/pipe.c:89
1 lock held by syz-executor.1/13068:
#0: ffff88807ea43c68 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock_nested fs/pipe.c:81 [inline]
#0: ffff88807ea43c68 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock+0x5a/0x70 fs/pipe.c:89
1 lock held by syz-executor.1/14266:
#0: ffff888077087068 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock_nested fs/pipe.c:81 [inline]
#0: ffff888077087068 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock+0x5a/0x70 fs/pipe.c:89
1 lock held by syz-executor.1/17178:
#0: ffff888075fcf468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock_nested fs/pipe.c:81 [inline]
#0: ffff888075fcf468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock+0x5a/0x70 fs/pipe.c:89
1 lock held by syz-executor.1/17179:
#0: ffff888075fcf468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:102 [inline]
#0: ffff888075fcf468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x49/0x320 fs/pipe.c:717
1 lock held by syz-executor.4/20025:
1 lock held by syz-executor.5/20042:
#0: ffff88807d518f28 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
#0: ffff88807d518f28 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x9d6/0x11c0 arch/x86/mm/fault.c:1348
2 locks held by syz-executor.5/20070:
#0: ffff888021094130 (&clk->rwsem){.+.+}-{3:3}, at: get_posix_clock kernel/time/posix-clock.c:24 [inline]
#0: ffff888021094130 (&clk->rwsem){.+.+}-{3:3}, at: posix_clock_read+0x54/0x190 kernel/time/posix-clock.c:42
#1: ffff888021095760 (&ptp->tsevq_mux){+.+.}-{3:3}, at: ptp_read+0xd3/0x7e0 drivers/ptp/ptp_chardev.c:461
1 lock held by syz-executor.5/20079:
1 lock held by syz-executor.5/20081:
1 lock held by syz-executor.0/20045:
#0: ffff88807c1c4468 (&pipe->mutex/1){+.+.}-{3:3}, at: __pipe_lock fs/pipe.c:102 [inline]
#0: ffff88807c1c4468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_release+0x49/0x320 fs/pipe.c:717
1 lock held by syz-executor.0/20048:
#0: ffff88807c1c4468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock_nested fs/pipe.c:81 [inline]
#0: ffff88807c1c4468 (&pipe->mutex/1){+.+.}-{3:3}, at: pipe_lock+0x5a/0x70 fs/pipe.c:89
1 lock held by syz-executor.3/20049:
#0: ffff88807d51f828 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
#0: ffff88807d51f828 (&mm->mmap_lock#2){++++}-{3:3}, at: vm_mmap_pgoff+0x15c/0x290 mm/util.c:517
1 lock held by syz-executor.3/20052:
=============================================
NMI backtrace for cpu 0
CPU: 0 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14776 Comm: syz-executor.2 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lock_acquire+0x1f9/0x510 kernel/locking/lockdep.c:5608
Code: 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 <48> c7 43 08 00 00 00 00 48 8b 84 24 a8 00 00 00 65 48 2b 04 25 28
RSP: 0018:ffffc9000282fe08 EFLAGS: 00000086
RAX: dffffc0000000000 RBX: fffff52000505fc3 RCX: ffffffff815c8dbf
RDX: 1ffff1100415c4eb RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fd45a17
R10: fffffbfff1fa8b42 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888020ae2428 R15: 0000000000000000
FS: 0000555557455400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558823656298 CR3: 000000002dc67000 CR4: 0000000000350ee0
Call Trace:
do_write_seqcount_begin_nested include/linux/seqlock.h:520 [inline]
do_write_seqcount_begin include/linux/seqlock.h:545 [inline]
vtime_user_enter+0x9f/0x170 kernel/sched/cputime.c:709
__context_tracking_enter+0xef/0x100 kernel/context_tracking.c:82
user_enter_irqoff include/linux/context_tracking.h:41 [inline]
__exit_to_user_mode kernel/entry/common.c:130 [inline]
syscall_exit_to_user_mode+0x48/0x60 kernel/entry/common.c:302
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f83a8274f87
Code: 89 7c 24 10 48 89 4c 24 18 e8 35 50 02 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 65 50 02 00 8b 44
RSP: 002b:00007ffe92bc6f00 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: 0000000000000000 RBX: 0000000000000373 RCX: 00007f83a8274f87
RDX: 0000000040000001 RSI: 00007ffe92bc6f8c RDI: 00000000ffffffff
RBP: 00007ffe92bc6f8c R08: 0000000000000000 R09: 00007ffe92bcb080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000002a1f34 R14: 0000000000000006 R15: 00007ffe92bc6ff0
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 9c pushfq
3: 58 pop %rax
4: f6 c4 02 test $0x2,%ah
7: 0f 85 9f 02 00 00 jne 0x2ac
d: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp)
13: 74 01 je 0x16
15: fb sti
16: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1d: fc ff df
20: 48 01 c3 add %rax,%rbx
23: 48 c7 03 00 00 00 00 movq $0x0,(%rbx)
* 2a: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) <-- trapping instruction
31: 00
32: 48 8b 84 24 a8 00 00 mov 0xa8(%rsp),%rax
39: 00
3a: 65 gs
3b: 48 rex.W
3c: 2b .byte 0x2b
3d: 04 25 add $0x25,%al
3f: 28 .byte 0x28