INFO: task syz.0.196:6054 blocked for more than 143 seconds.
Not tainted 6.11.0-rc6-syzkaller-01251-g525034e2e2ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.196 state:D stack:24672 pid:6054 tgid:6054 ppid:5233 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: 0033:0x7ff33717def9
RSP: 002b:00007ffe2234efe8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ff337337a80 RCX: 00007ff33717def9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007ff337337a80 R08: 0000000000000006 R09: 00007ffe2234f2df
R10: 00000000003ffd04 R11: 0000000000000246 R12: 0000000000014ab8
R13: 00007ffe2234f0f0 R14: 0000000000000226 R15: ffffffffffffffff
INFO: task syz.0.196:6062 blocked for more than 145 seconds.
Not tainted 6.11.0-rc6-syzkaller-01251-g525034e2e2ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.196 state:D stack:27360 pid:6062 tgid:6054 ppid:5233 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_write+0x1c9/0x1a40 fs/pipe.c:455
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff33717def9
RSP: 002b:00007ff336bff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff337336058 RCX: 00007ff33717def9
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007ff3371f09f6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ff337336058 R15: 00007ffe2234ee88
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 udevd/4686:
2 locks held by getty/4988:
#0: ffff88803039b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by dhcpcd/5045:
1 lock held by syz.0.196/6054:
#0: ffff888012b14468 (&pipe->mutex){+.+.}-{3:3}, at: pipe_release+0x4e/0x330 fs/pipe.c:727
1 lock held by syz.0.196/6056:
#0: ffff888012b14468 (&pipe->mutex){+.+.}-{3:3}, at: splice_file_to_pipe+0x2e/0x500 fs/splice.c:1292
1 lock held by syz.0.196/6062:
#0: ffff888012b14468 (&pipe->mutex){+.+.}-{3:3}, at: pipe_write+0x1c9/0x1a40 fs/pipe.c:455
1 lock held by syz-executor/6133:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc6-syzkaller-01251-g525034e2e2ee #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5241 Comm: syz-executor Not tainted 6.11.0-rc6-syzkaller-01251-g525034e2e2ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:unwind_next_frame+0x6b0/0x2a00 arch/x86/kernel/unwind_orc.c:505
Code: e8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 88 1b 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 93 1b 00 00 0f b6 5d 01 <83> e3 07 48 89 df 48 c7 c6 80 3d 7a 8e e8 1e 64 52 00 48 85 db 74
RSP: 0018:ffffc9000371f608 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffff88802d5a9e00
RDX: 0000000000000000 RSI: ffffffff81fa9c6f RDI: ffffffff81fa9b96
RBP: ffffffff90aa0f3c R08: ffffffff81412c60 R09: ffffc9000371f7d0
R10: 0000000000000003 R11: ffffffff817f2f80 R12: ffffffff90311a6c
R13: dffffc0000000000 R14: 1ffff920006e3edc R15: ffffffff90aa0f38
FS: 0000555558d4e500(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f44a7136060 CR3: 0000000069048000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
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: 0033:0x7fb773574157
Code: 89 7c 24 10 48 89 4c 24 18 e8 55 16 03 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 a5 16 03 00 8b 44
RSP: 002b:00007ffe941af0d0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000092 RCX: 00007fb773574157
RDX: 0000000040000001 RSI: 00007ffe941af12c RDI: 00000000ffffffff
RBP: 00007ffe941af12c R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000015188 R14: 0000000000015160 R15: 00007ffe941af180