INFO: task kworker/1:2:1530 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2 state:D stack:23536 pid: 1530 ppid: 2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
usb_kill_urb+0x1d5/0x310 drivers/usb/core/urb.c:720
usb_start_wait_urb+0x265/0x530 drivers/usb/core/message.c:64
usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
usb_control_msg+0x2a5/0x4b0 drivers/usb/core/message.c:153
hub_port_init+0x9f1/0x2df0 drivers/usb/core/hub.c:4829
hub_port_connect+0xcf8/0x27d0 drivers/usb/core/hub.c:5280
hub_port_connect_change+0x5f9/0xc20 drivers/usb/core/hub.c:5488
port_event+0xb67/0x1220 drivers/usb/core/hub.c:5634
hub_event+0x4ed/0xe40 drivers/usb/core/hub.c:5716
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d900 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
5 locks held by kworker/1:2/1530:
#0: ffff8881427d0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140
#1: ffffc900060c7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2273
#2: ffff88801e44b220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
#2: ffff88801e44b220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1b2/0xe40 drivers/usb/core/hub.c:5662
#3: ffff88801e44e5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline]
#3: ffff88801e44e5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect+0xce1/0x27d0 drivers/usb/core/hub.c:5279
#4: ffff88801e2a0c68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_init+0x1ef/0x2df0 drivers/usb/core/hub.c:4703
1 lock held by in:imklog/6147:
2 locks held by kworker/u4:8/1352:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2942 Comm: systemd-udevd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x82/0x1c0 lib/smp_processor_id.c:19
Code: 00 00 48 3b 44 24 08 0f 85 52 01 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 <4c> 8b 24 24 bd 00 02 00 00 be 00 02 00 00 4c 21 e6 31 ff 0f 1f 44
RSP: 0018:ffffc90001aaf450 EFLAGS: 00000046
RAX: aa1f3326def57c00 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8207ee50 R09: fffffbfff1bfa646
R10: fffffbfff1bfa646 R11: 0000000000000000 R12: 0000000000000246
R13: ffff8880197d5700 R14: ffffffff8a6f0c00 R15: ffffffff8ad4aee0
FS: 00007fb49f48a8c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f84d2063a8 CR3: 0000000077109000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:433 [inline]
lock_is_held_type+0x77/0x190 kernel/locking/lockdep.c:5682
lock_is_held include/linux/lockdep.h:283 [inline]
__might_resched+0x96/0x790 kernel/sched/core.c:9501
down_read+0x15/0x50 kernel/locking/rwsem.c:1473
kernfs_dop_revalidate+0x87/0x4a0 fs/kernfs/dir.c:1069
lookup_fast+0x3a6/0x800
walk_component+0x11b/0x790 fs/namei.c:1966
link_path_walk+0x697/0xd00
path_lookupat+0xab/0x6c0 fs/namei.c:2448
filename_lookup+0x270/0x640 fs/namei.c:2478
user_path_at_empty+0x40/0x1a0 fs/namei.c:2801
user_path_at include/linux/namei.h:57 [inline]
vfs_statx+0x10a/0x3f0 fs/stat.c:221
vfs_fstatat fs/stat.c:243 [inline]
vfs_lstat include/linux/fs.h:3357 [inline]
__do_sys_newlstat fs/stat.c:398 [inline]
__se_sys_newlstat+0xba/0x750 fs/stat.c:392
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb49e2fc335
Code: 69 db 2b 00 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 8b 15 31 db 2b 00 f7 d8 64 89
RSP: 002b:00007ffe7a15b248 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 000055f84d1c5ad0 RCX: 00007fb49e2fc335
RDX: 00007ffe7a15b280 RSI: 00007ffe7a15b280 RDI: 000055f84d1c4ad0
RBP: 00007ffe7a15b340 R08: 00007fb49e5bb228 R09: 0000000000001010
R10: 00007fb49e5bab58 R11: 0000000000000246 R12: 000055f84d1c4ad0
R13: 000055f84d1c4aea R14: 000055f84d1d5ea5 R15: 000055f84d1d5eaa
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 48 3b 44 24 08 cmp 0x8(%rsp),%rax
7: 0f 85 52 01 00 00 jne 0x15f
d: 89 d8 mov %ebx,%eax
f: 48 83 c4 10 add $0x10,%rsp
13: 5b pop %rbx
14: 41 5c pop %r12
16: 41 5d pop %r13
18: 41 5e pop %r14
1a: 41 5f pop %r15
1c: 5d pop %rbp
1d: c3 retq
1e: 48 c7 04 24 00 00 00 movq $0x0,(%rsp)
25: 00
26: 9c pushfq
27: 8f 04 24 popq (%rsp)
* 2a: 4c 8b 24 24 mov (%rsp),%r12 <-- trapping instruction
2e: bd 00 02 00 00 mov $0x200,%ebp
33: be 00 02 00 00 mov $0x200,%esi
38: 4c 21 e6 and %r12,%rsi
3b: 31 ff xor %edi,%edi
3d: 0f .byte 0xf
3e: 1f (bad)
3f: 44 rex.R