INFO: task syz.3.83:5857 blocked for more than 144 seconds.
Not tainted 6.12.0-rc3-next-20241014-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.83 state:D stack:23840 pid:5857 tgid:5857 ppid:5450 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1895/0x4b30 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+0xe2a/0x1850 fs/fuse/dev.c:572
fuse_simple_request fs/fuse/fuse_i.h:1162 [inline]
fuse_flush+0x6bb/0x980 fs/fuse/file.c:542
filp_flush+0xb7/0x160 fs/open.c:1527
filp_close+0x1e/0x40 fs/open.c:1540
__range_close fs/file.c:788 [inline]
__do_sys_close_range fs/file.c:847 [inline]
__se_sys_close_range+0x38b/0x6d0 fs/file.c:811
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: 0033:0x7fe476b7dff9
RSP: 002b:00007fffec358f38 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007fe476d37a80 RCX: 00007fe476b7dff9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fe476d37a80 R08: 00007fe476d22000 R09: 00007fffec35922f
R10: 00000000005f2444 R11: 0000000000000246 R12: 0000000000018fe1
R13: 00007fffec359040 R14: 0000000000000032 R15: ffffffffffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e939e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/4993:
#0: ffff888032a420a0 (&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+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5223:
2 locks held by kworker/u9:5/5247:
#0: ffff88802515e148 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88802515e148 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90003fb7d00 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003fb7d00 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
1 lock held by udevd/5249:
1 lock held by udevd/5438:
1 lock held by syz-executor/5443:
1 lock held by syz-executor/5450:
1 lock held by syz.0.73/5929:
1 lock held by syz.0.73/5936:
1 lock held by dhcpcd-run-hook/5937:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-next-20241014-syzkaller #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5450 Comm: syz-executor Not tainted 6.12.0-rc3-next-20241014-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:mark_lock+0x120/0x360 kernel/locking/lockdep.c:4703
Code: 00 83 3d 42 06 ad 0e 00 75 19 90 48 c7 c7 00 ce 0a 8c 48 c7 c6 a0 d0 0a 8c e8 ec 10 e5 ff 90 0f 0b 90 90 90 31 db 48 83 c3 60 <48> 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 4a fb 8d 00
RSP: 0018:ffffc90004aafb08 EFLAGS: 00000082
RAX: 0000000000001a90 RBX: ffffffff93c621b0 RCX: ffffffff8170d9da
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942e8800
RBP: 0000000000000009 R08: ffffffff942e8807 R09: 1ffffffff285d100
R10: dffffc0000000000 R11: fffffbfff285d101 R12: ffff888025d20000
R13: dffffc0000000000 R14: 0000000000000200 R15: ffff888025d20b08
FS: 000055555589d500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa11df35f88 CR3: 000000006ef4e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4646 [inline]
__lock_acquire+0xc35/0x2050 kernel/locking/lockdep.c:5156
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:2317 [inline]
bpf_trace_run2+0x219/0x540 kernel/trace/bpf_trace.c:2359
__bpf_trace_sys_enter+0x38/0x60 include/trace/events/syscalls.h:18
trace_sys_enter+0xd9/0x150 include/trace/events/syscalls.h:18
syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61
syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe476b19959
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007fffec358b80 EFLAGS: 00000293 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fe476b19959
RDX: 00007fffec358b80 RSI: 00007fffec358cb0 RDI: 0000000000000011
RBP: 00007fffec35919c R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000002c
R13: 0000000000018d46 R14: 0000000000018c9c R15: 00007fffec3591f0