INFO: task syz.1.233:5980 blocked for more than 143 seconds.
Not tainted 6.11.0-rc3-syzkaller-00221-g670c12ce09a8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.233 state:D stack:24080 pid:5980 tgid:5979 ppid:5231 flags:0x00004002
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
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write+0x1d7/0x220 kernel/locking/rwsem.c:1580
__super_lock fs/super.c:56 [inline]
__super_lock_excl fs/super.c:71 [inline]
deactivate_super+0xb5/0xf0 fs/super.c:505
cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
task_work_run+0x251/0x310 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xa2f/0x27f0 kernel/exit.c:882
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x16a1/0x1740 kernel/signal.c:2917
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: 0033:0x7f7f1a379e79
RSP: 002b:00007f7f19dff038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: 0000000000000000 RBX: 00007f7f1a515f80 RCX: 00007f7f1a379e79
RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f7f1a3e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7f1a515f80 R15: 00007ffcf7fbb6e8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e9382e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by kworker/u8:2/35:
3 locks held by kworker/u9:1/4616:
#0: ffff8880adfab148 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff8880adfab148 ((wq_completion)hci6){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc9000c98fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc9000c98fd00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffff88802aab8d80 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:327
2 locks held by getty/4987:
#0: ffff88802b9f30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5217:
1 lock held by syz.1.233/5980:
#0: ffff88805aa860e0 (&type->s_umount_key#115){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88805aa860e0 (&type->s_umount_key#115){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88805aa860e0 (&type->s_umount_key#115){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
2 locks held by syz.2.2031/12276:
4 locks held by syz-executor/12306:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller-00221-g670c12ce09a8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/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: 12192 Comm: syz-executor Not tainted 6.11.0-rc3-syzkaller-00221-g670c12ce09a8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:lockdep_hardirqs_on_prepare+0x46f/0x780 kernel/locking/lockdep.c:4360
Code: ff df b8 ff ff ff ff 65 0f c1 05 7c f4 92 7e 83 f8 01 4c 8b 7c 24 18 75 38 48 c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 <65> 48 8b 04 25 28 00 00 00 48 3b 44 24 60 0f 85 ab 02 00 00 48 8d
RSP: 0018:ffffc9000966f900 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff88802a62c6c0 RCX: ffffffff94f29903
RDX: dffffc0000000000 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c606900
RBP: ffffc9000966f9a8 R08: ffffffff9017d6ef R09: 1ffffffff202fadd
R10: dffffc0000000000 R11: fffffbfff202fade R12: dffffc0000000000
R13: 1ffff920012cdf40 R14: ffff88802a62c6d8 R15: 1ffff920012cdf24
FS: 0000555560846500(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555dfc961f8e CR3: 000000007c658000 CR4: 0000000000350ef0
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
__local_bh_enable_ip+0x168/0x200 kernel/softirq.c:387
local_bh_enable include/linux/bottom_half.h:33 [inline]
fpregs_unlock arch/x86/include/asm/fpu/api.h:80 [inline]
restore_fpregs_from_user arch/x86/kernel/fpu/signal.c:331 [inline]
__fpu_restore_sig arch/x86/kernel/fpu/signal.c:359 [inline]
fpu__restore_sig+0x969/0x11b0 arch/x86/kernel/fpu/signal.c:493
restore_sigcontext+0x675/0x7d0 arch/x86/kernel/signal_64.c:95
__do_sys_rt_sigreturn+0x17f/0x270 arch/x86/kernel/signal_64.c:263
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: 0033:0x7f686d7700d7
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:00007ffc982020a0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 000000000000003e RCX: 00007f686d7700d7
RDX: 0000000040000001 RSI: 00007ffc982020fc RDI: 00000000ffffffff
RBP: 00007ffc982020fc R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000095894 R14: 0000000000095830 R15: 00007ffc98202150