INFO: task udevd:10371 blocked for more than 143 seconds.
Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:24448 pid:10371 tgid:10371 ppid:2549 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xcda/0x2f80 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 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+0x5b8/0x9c0 kernel/locking/mutex.c:752
device_lock include/linux/device.h:1009 [inline]
uevent_show+0x188/0x3b0 drivers/base/core.c:2743
dev_attr_show+0x53/0xe0 drivers/base/core.c:2437
sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230
kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x869/0xbd0 fs/read_write.c:476
ksys_read+0x12f/0x260 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faa06cc4b6a
RSP: 002b:00007ffc5bd08378 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00005623de9bbd80 RCX: 00007faa06cc4b6a
RDX: 0000000000001000 RSI: 00005623dea41620 RDI: 0000000000000008
RBP: 00005623de9bbd80 R08: 0000000000000008 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffc5bd08858 R15: 000000000000000a
Showing all locks held in the system:
5 locks held by kworker/0:1/9:
#0: ffff8881052d0148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000009fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff888106bfd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888106bfd190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff88812dced190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88812dced190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1004
#4: ffff888116cf3160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff888116cf3160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1004
3 locks held by kworker/1:0/24:
#0: ffff8881052d0148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000019fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff888108be2190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888108be2190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
1 lock held by khungtaskd/30:
#0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620
2 locks held by getty/2607:
#0: ffff88810eb340a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
1 lock held by sshd/2640:
6 locks held by kworker/1:4/4968:
5 locks held by kworker/1:6/5560:
1 lock held by syz-executor/7253:
4 locks held by udevd/9536:
#0: ffff88812d8a7540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff888111557088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88811f049f08 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff888104edd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff888104edd190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
4 locks held by udevd/9610:
#0: ffff88811229e0a0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff88811cdd4088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff888111d74e18 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88812dced190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88812dced190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
4 locks held by udevd/10371:
#0: ffff8881117a3b08 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff88811b847088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff888121ed9d28 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff888113517190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff888113517190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
3 locks held by kworker/1:2/11140:
#0: ffff8881052d0148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000226fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff888108f14190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888108f14190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
2 locks held by kworker/u8:0/19488:
1 lock held by syz-executor/19950:
#0: ffffffff88cc2038 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:296
1 lock held by syz.0.3838/21333:
#0: ffffffff88cc2038 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:328
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #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+0x116/0x1f0 lib/dump_stack.c:119
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf4e/0x1280 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 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: 19950 Comm: syz-executor Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x326/0x23a0 arch/x86/kernel/unwind_orc.c:494
Code: 14 52 48 8d 94 12 20 25 87 8a 48 81 fa 86 87 fd 8a 0f 87 e6 09 00 00 e8 58 03 3e 00 8b 54 24 34 4c 89 e1 4c 89 ee 8b 44 24 28 <4a> 8d 3c b5 dc 38 38 8a 29 c2 e8 2b f1 ff ff 49 89 c4 e8 33 03 3e
RSP: 0018:ffffc900005978d8 EFLAGS: 00000293
RAX: 0000000000130ecb RBX: ffffc90000597958 RCX: ffffffff8700012f
RDX: 0000000000130eec RSI: ffffffff8af97de2 RDI: ffffffff8b158790
RBP: 0000000000000001 R08: 0000000000000004 R09: 0000000000060001
R10: 0000000000062000 R11: 0000000000000000 R12: ffffffff8700012f
R13: ffffffff8af97de2 R14: 0000000000130ecb R15: ffffc9000059798d
FS: 0000000000000000(0000) GS:ffff8881f6300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75a8524440 CR3: 0000000120d1a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1094 [inline]
free_unref_page+0x698/0xce0 mm/page_alloc.c:2612
vfree+0x181/0x7a0 mm/vmalloc.c:3364
kcov_put kernel/kcov.c:429 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:425
kcov_close+0x10/0x20 kernel/kcov.c:525
__fput+0x408/0xbb0 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:222
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xaa3/0x2b30 kernel/exit.c:882
do_group_exit+0xd3/0x2a0 kernel/exit.c:1031
__do_sys_exit_group kernel/exit.c:1042 [inline]
__se_sys_exit_group kernel/exit.c:1040 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1040
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fddd74b99f9
Code: Unable to access opcode bytes at 0x7fddd74b99cf.
RSP: 002b:00007fffc876bc48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fddd74b99f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000043
RBP: 00007fddd7528e29 R08: 00007fffc87699e6 R09: 00000000001b344a
R10: 000000000000000a R11: 0000000000000246 R12: 0000000000000020
R13: 00000000001b344a R14: 00000000001b344a R15: 00007fffc876bdf0