INFO: task syz.1.850:8211 blocked for more than 143 seconds.
Not tainted 6.12.0-rc3-syzkaller-00389-g3d5ad2d4eca3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.850 state:D stack:23808 pid:8211 tgid:8211 ppid:8067 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1843/0x4ae0 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
request_wait_answer fs/fuse/dev.c:464 [inline]
__fuse_request_send fs/fuse/dev.c:478 [inline]
__fuse_simple_request+0xe17/0x1840 fs/fuse/dev.c:572
fuse_simple_request fs/fuse/fuse_i.h:1156 [inline]
fuse_flush+0x69d/0x950 fs/fuse/file.c:542
filp_flush+0xac/0x150 fs/open.c:1525
filp_close+0x1e/0x40 fs/open.c:1538
__range_close fs/file.c:703 [inline]
__close_range+0x380/0x6c0 fs/file.c:760
__do_sys_close_range fs/open.c:1591 [inline]
__se_sys_close_range fs/open.c:1588 [inline]
__x64_sys_close_range+0x7a/0x90 fs/open.c:1588
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: 0033:0x7fbd2557dff9
RSP: 002b:00007ffde9aeae18 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00000000000356e9 RCX: 00007fbd2557dff9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fbd25737a80 R08: 0000000000000001 R09: 00007ffde9aeb10f
R10: 00007fbd25400000 R11: 0000000000000246 R12: 0000000000035789
R13: 00007ffde9aeaf20 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4983:
#0: ffff8880342820a0 (&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+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/8744:
1 lock held by syz.4.1045/8865:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00389-g3d5ad2d4eca3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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: 8744 Comm: syz-executor Not tainted 6.12.0-rc3-syzkaller-00389-g3d5ad2d4eca3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:unwind_next_frame+0x498/0x22d0 arch/x86/kernel/unwind_orc.c:512
Code: 04 48 8d 5a 05 4c 89 f8 48 c1 e8 03 48 89 44 24 70 42 0f b6 04 20 84 c0 48 89 54 24 10 0f 85 79 16 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 8a 16 00 00 41 0f b7 1f c1 eb 0b 80 e3
RSP: 0018:ffffc90003eef630 EFLAGS: 00000806
RAX: 1ffffffff2144daa RBX: ffffffff90a26d51 RCX: ffffffff902cf074
RDX: ffffffff90a26d4c RSI: ffffffff90a26d4c RDI: 0000000000000001
RBP: ffffc90003eef750 R08: 0000000000000001 R09: ffffc90003eef7f0
R10: ffffc90003eef750 R11: ffffffff8180a090 R12: dffffc0000000000
R13: ffffc90003eef700 R14: ffffffff90a26d51 R15: ffffffff90a26d50
FS: 000055556b839500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd88404b40 CR3: 00000000416b4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x11c/0x150 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 mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kmem_cache_free+0x1a2/0x420 mm/slub.c:4681
__sigqueue_free kernel/signal.c:451 [inline]
collect_signal kernel/signal.c:594 [inline]
__dequeue_signal+0x4ac/0x5c0 kernel/signal.c:616
dequeue_signal+0x1e0/0x680 kernel/signal.c:637
get_signal+0x604/0x1740 kernel/signal.c:2797
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
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: 0033:0x7f28dcd7fdc4
Code: 89 4c 24 1c e8 ed 5a 02 00 44 8b 54 24 1c 8b 3c 24 45 31 c9 89 c5 48 8b 54 24 10 48 8b 74 24 08 45 31 c0 b8 2d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 04 24 e8 39 5b 02 00 48 8b 04
RSP: 002b:00007fff6e621370 EFLAGS: 00000246
RAX: 0000000000000024 RBX: 00007f28dda64620 RCX: 00007f28dcd7fdc4
RDX: 0000000000001000 RSI: 00007f28dda64670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f28dda64670 R15: 0000000000000000