INFO: task syz-executor:5833 blocked for more than 143 seconds.
Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:19256 pid:5833 tgid:5833 ppid:1 task_flags:0x400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
__bch2_fs_stop+0x3cd/0x5b0 fs/bcachefs/super.c:651
generic_shutdown_super+0x13b/0x2d0 fs/super.c:642
bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2303
deactivate_locked_super+0xc6/0x130 fs/super.c:473
cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
task_work_run+0x253/0x310 kernel/task_work.c:227
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:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x210 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f94c278fc97
RSP: 002b:00007fff1ea67c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f94c281089d RCX: 00007f94c278fc97
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff1ea67cc0
RBP: 00007fff1ea67cc0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff1ea68d50
R13: 00007f94c281089d R14: 0000000000030648 R15: 00007fff1ea68d90
Showing all locks held in the system:
2 locks held by kworker/u8:1/13:
#0: ffff8880b8739b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffffc90000127c60 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90000127c60 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9cb/0x18e0 kernel/workqueue.c:3319
1 lock held by khungtaskd/31:
#0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
2 locks held by kworker/u8:3/38:
2 locks held by udevd/5206:
#0: ffff8880b8739b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#1: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#1: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
#1: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xb8/0x23b0 arch/x86/kernel/unwind_orc.c:479
2 locks held by getty/5586:
#0: ffff888035aa20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000362c2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5833:
#0: ffff8880798980e0 (&type->s_umount_key#110){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880798980e0 (&type->s_umount_key#110){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880798980e0 (&type->s_umount_key#110){+.+.}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
4 locks held by sed/11959:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:437
kthread+0x7b9/0x940 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11965 Comm: rm Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4326 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4344 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x133/0x2b0 kernel/locking/lockdep.c:4411
Code: fb 31 73 2a 41 8b 44 24 20 a9 00 00 04 00 74 db 31 d2 a9 00 00 03 00 0f 94 c2 83 f2 03 4c 89 f7 4c 89 e6 e8 5f 4a 00 00 85 c0 <75> bf eb 76 48 c7 c7 f0 ed c0 8e 48 89 de e8 8a ad a1 03 eb c5 41
RSP: 0018:ffffc90003dff7a0 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000003
RDX: 0000000000000003 RSI: ffff88802c2de4f0 RDI: ffff88802c2dda00
RBP: ffffc90003dff830 R08: ffffffff905fe877 R09: 1ffffffff20bfd0e
R10: dffffc0000000000 R11: fffffbfff20bfd0f R12: ffff88802c2de4f0
R13: ffffffff93686020 R14: ffff88802c2dda00 R15: ffff88802c2de4f0
FS: 0000000000000000(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f700e01e270 CR3: 0000000045a94000 CR4: 0000000000350ef0
Call Trace:
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:78
raw_spin_rq_unlock_irq kernel/sched/sched.h:1525 [inline]
finish_lock_switch kernel/sched/core.c:5130 [inline]
finish_task_switch+0x1e5/0x870 kernel/sched/core.c:5248
context_switch kernel/sched/core.c:5385 [inline]
__schedule+0x1b90/0x5240 kernel/sched/core.c:6767
preempt_schedule_irq+0xfe/0x1c0 kernel/sched/core.c:7090
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:qlink_to_object mm/kasan/quarantine.c:140 [inline]
RIP: 0010:qlink_free mm/kasan/quarantine.c:145 [inline]
RIP: 0010:qlist_free_all+0x71/0x140 mm/kasan/quarantine.c:179
Code: 4c 05 08 f6 c1 01 0f 85 a8 00 00 00 4c 01 e8 66 90 0f b6 48 33 c1 e1 18 81 f9 00 00 00 f5 48 0f 45 c5 48 8b 58 08 4d 8b 34 24 <48> 63 83 c0 00 00 00 49 29 c4 48 89 df 4c 89 e6 e8 8a e5 ff ff 66
RSP: 0018:ffffc90003dffbf8 EFLAGS: 00000246
RAX: ffffea0001f0ba80 RBX: ffff88801b041780 RCX: 00000000f5000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff816f370c R09: 1ffffffff20bfd0e
R10: dffffc0000000000 R11: fffffbfff20bfd0f R12: ffff88807c2ead80
R13: ffffea0000000000 R14: ffff888034704a38 R15: 0000000000000000
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4161 [inline]
slab_alloc_node mm/slub.c:4210 [inline]
kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4217
getname_flags+0xb7/0x530 fs/namei.c:146
getname include/linux/fs.h:2852 [inline]
do_sys_openat2+0xbf/0x1d0 fs/open.c:1423
do_sys_open fs/open.c:1444 [inline]
__do_sys_openat fs/open.c:1460 [inline]
__se_sys_openat fs/open.c:1455 [inline]
__x64_sys_openat+0x249/0x2a0 fs/open.c:1455
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f700e2c7a46
Code: 10 00 00 00 44 8b 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 0c f7 d8 89 05 0a 48 01 00 48 83 c8 ff c3 31
RSP: 002b:00007ffe09ecd0a8 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffe09ecd308 RCX: 00007f700e2c7a46
RDX: 0000000000080000 RSI: 00007ffe09ecd120 RDI: 00000000ffffff9c
RBP: 00007ffe09ecd110 R08: 0000000000080000 R09: 00007ffe09ecd120
R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffe09ecd120
R13: 0000000000000008 R14: 00007ffe09ecd2ef R15: 00000000ffffffff