INFO: task syz.1.924:9730 blocked for more than 143 seconds.
Not tainted 6.11.0-rc6-syzkaller-01155-gf723224742fc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.924 state:D stack:24672 pid:9730 tgid:9730 ppid:9630 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
pipe_release+0x4e/0x330 fs/pipe.c:727
__fput+0x24a/0x8a0 fs/file_table.c:422
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdf0917cef9
RSP: 002b:00007ffd7343a048 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fdf09337a80 RCX: 00007fdf0917cef9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fdf09337a80 R08: 0000000000000006 R09: 00007ffd7343a33f
R10: 00000000003ffca0 R11: 0000000000000246 R12: 00000000000565bf
R13: 00007ffd7343a150 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e938320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by getty/4982:
#0: ffff8880305fb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/9630:
2 locks held by syz-executor/9635:
1 lock held by syz.1.924/9730:
#0: ffff888032622868 (&pipe->mutex){+.+.}-{3:3}, at: pipe_release+0x4e/0x330 fs/pipe.c:727
1 lock held by syz.1.924/9732:
#0: ffff888032622868 (&pipe->mutex){+.+.}-{3:3}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc6-syzkaller-01155-gf723224742fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5216 Comm: syz-executor Not tainted 6.11.0-rc6-syzkaller-01155-gf723224742fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:kasan_save_free_info+0x0/0x50 mm/kasan/generic.c:569
Code: e8 25 d7 bf 09 48 89 df 89 ee 5b 5d e9 b9 cc ff ff 5b 5d c3 cc cc cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 53 48 63 bf c0 00 00 00 48 81 ff ff ff ff 7f 74 2e 48
RSP: 0018:ffffc9000362faa0 EFLAGS: 00000046
RAX: ffffed1009d08f88 RBX: ffff88804e847c40 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88804e847c40 RDI: ffff88801c6e73c0
RBP: ffffffff8159700c R08: dffffc0000000000 R09: 0000000000000000
R10: ffffed1009d08f88 R11: fffffbfff34b4318 R12: ffffea00013a11c0
R13: ffff88804e847c40 R14: ffff88801c6e73c0 R15: 0000000000000000
FS: 0000555566497500(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd7ea34d58 CR3: 00000000276ea000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2256 [inline]
slab_free mm/slub.c:4477 [inline]
kmem_cache_free+0x145/0x350 mm/slub.c:4552
__sigqueue_free kernel/signal.c:451 [inline]
collect_signal kernel/signal.c:594 [inline]
__dequeue_signal+0x4ac/0x5c0 kernel/signal.c:616
dequeue_signal+0x169/0x5a0 kernel/signal.c:639
get_signal+0x602/0x1740 kernel/signal.c:2796
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9519d18a67
Code: 48 83 c4 08 c3 66 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff 64 89 02 b8 ff ff ff ff eb e4 0f 1f 80 00 00 00 00 b8 3e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc69370228 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 00005555664b06b0 RCX: 00007f9519d18a67
RDX: 0000000000000001 RSI: 0000000000000009 RDI: 00000000ffffda7f
RBP: 00005555664b06b0 R08: 000000000826cb30 R09: 00005555664ab678
R10: 00007f951aa710b8 R11: 0000000000000293 R12: 00007ffc6937023c
R13: 00005555664ab670 R14: 00007ffc693702e0 R15: 00005555664b6720