INFO: task udevd:5217 blocked for more than 143 seconds.
Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:25568 pid:5217 tgid:5217 ppid:2862 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x1042/0x34b0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
device_lock include/linux/device.h:1014 [inline]
uevent_show+0x188/0x3b0 drivers/base/core.c:2736
dev_attr_show+0x53/0xe0 drivers/base/core.c:2430
sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230
kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:488 [inline]
vfs_read+0x87f/0xbe0 fs/read_write.c:569
ksys_read+0x12f/0x260 fs/read_write.c:712
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: 0033:0x7f464be8ab6a
RSP: 002b:00007ffef1177a78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000056090b6b3570 RCX: 00007f464be8ab6a
RDX: 0000000000001000 RSI: 000056090b6d2390 RDI: 0000000000000008
RBP: 000056090b6b3570 R08: 0000000000000008 R09: 0000000000000020
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffef1177f58 R15: 000000000000000a
Showing all locks held in the system:
3 locks held by kworker/1:0/24:
1 lock held by khungtaskd/30:
#0: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff88ebb140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
3 locks held by kworker/1:1/36:
#0: ffff8881062d4148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90000267d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff8881093eb190
(
&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
6 locks held by kworker/1:2/691:
#0: ffff8881062d4148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc900018afd80
((work_completion)(&hub->events)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff88810afe6190
(
&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
#3:
ffffc900001b8cb0 ((&timer.timer)){+.-.}-{0:0}, at: console_trylock_spinning kernel/printk/printk.c:2042 [inline]
ffffc900001b8cb0 ((&timer.timer)){+.-.}-{0:0}, at: vprintk_emit+0x638/0x6f0 kernel/printk/printk.c:2406
#4: ffffffff88ea88b0
(console_srcu
){....}-{0:0}, at: raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline]
){....}-{0:0}, at: raw_spin_rq_lock kernel/sched/sched.h:1505 [inline]
){....}-{0:0}, at: rq_lock kernel/sched/sched.h:1804 [inline]
){....}-{0:0}, at: ttwu_queue kernel/sched/core.c:3951 [inline]
){....}-{0:0}, at: try_to_wake_up+0x50b/0x1170 kernel/sched/core.c:4281
#5: ffffffff88eed808 (tk_core.seq.seqcount
){----}-{0:0}, at: raw_spin_rq_lock_nested kernel/sched/core.c:598 [inline]
){----}-{0:0}, at: raw_spin_rq_lock kernel/sched/sched.h:1505 [inline]
){----}-{0:0}, at: rq_lock kernel/sched/sched.h:1804 [inline]
){----}-{0:0}, at: ttwu_queue kernel/sched/core.c:3951 [inline]
){----}-{0:0}, at: try_to_wake_up+0x50b/0x1170 kernel/sched/core.c:4281
2 locks held by getty/2922:
#0: ffff888100eae0a0
(&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+0xfba/0x1480 drivers/tty/n_tty.c:2211
4 locks held by udevd/5217:
#0: ffff88811df6a1c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff888119ab3488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88811dbc2c38 (kn->active){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88811712f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff88811712f190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2736
6 locks held by kworker/1:4/5239:
3 locks held by kworker/0:4/5276:
4 locks held by udevd/6798:
1 lock held by v4l_id/7312:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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+0xf0c/0x1240 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: 5577 Comm: udevd Not tainted 6.12.0-rc6-syzkaller-00153-g237d4e0f4113 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x20 kernel/kcov.c:313
Code: 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 58 fe ff ff 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 0c 24 89 f2 89 fe bf 05 00 00 00 e9 2a fe ff ff
RSP: 0018:ffffc9000fcd7878 EFLAGS: 00000246
RAX: 0000000000000007 RBX: ffffffff88d753e0 RCX: ffffffff85faa8f5
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000005
RBP: 1ffff92001f9af26 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88811e7a2840 R14: 0000000000000001 R15: ffffffff88d753e0
FS: 00007f464bd5fc80(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056090b6b2320 CR3: 000000011dd90000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
map_id_up+0xb4/0x370 kernel/user_namespace.c:384
from_kuid kernel/user_namespace.c:433 [inline]
from_kuid_munged+0x8e/0x130 kernel/user_namespace.c:458
__scm_recv_common include/net/scm.h:188 [inline]
scm_recv include/net/scm.h:205 [inline]
netlink_recvmsg+0x8f4/0xf30 net/netlink/af_netlink.c:1990
sock_recvmsg_nosec net/socket.c:1051 [inline]
sock_recvmsg+0x1f6/0x250 net/socket.c:1073
____sys_recvmsg+0x219/0x6b0 net/socket.c:2826
___sys_recvmsg+0x115/0x1a0 net/socket.c:2868
__sys_recvmsg+0x114/0x1e0 net/socket.c:2898
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: 0033:0x7f464be9891e
Code: ff 89 ef 48 89 04 24 e8 4f 57 f9 ff 48 8b 04 24 48 83 c4 30 5d c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 21 b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 70 48 8b 15 db c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffef117e358 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f464be9891e
RDX: 0000000000000000 RSI: 00007ffef117e388 RDI: 000000000000000c
RBP: 000056090b6f4490 R08: 0000000000000007 R09: beec62ddfdaf88cb
R10: 00000000ffffffff R11: 0000000000000246 R12: 000056090b6f4490
R13: 00007ffef117e448 R14: 0000000000000000 R15: 00005608f41cb4df