INFO: task jbd2/sda1-8:2801 blocked for more than 143 seconds.
Not tainted 6.15.0-rc6-syzkaller-00177-g882826f58b2c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D
stack:26072 pid:2801 tgid:2801 ppid:2 task_flags:0x240040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x132a/0x3b00 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
io_schedule+0xbf/0x130 kernel/sched/core.c:7742
bit_wait_io+0x15/0xe0 kernel/sched/wait_bit.c:247
__wait_on_bit+0x62/0x180 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0xd9/0x110 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:105 [inline]
__wait_on_buffer+0x64/0x70 fs/buffer.c:123
wait_on_buffer include/linux/buffer_head.h:422 [inline]
journal_wait_on_commit_record fs/jbd2/commit.c:171 [inline]
jbd2_journal_commit_transaction+0x4b45/0x6830 fs/jbd2/commit.c:881
kjournald2+0x1f4/0x760 fs/jbd2/journal.c:201
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:2950 blocked for more than 143 seconds.
Not tainted 6.15.0-rc6-syzkaller-00177-g882826f58b2c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:22728 pid:2950 tgid:2950 ppid:1 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x132a/0x3b00 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_read_slowpath+0x62f/0xb60 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0xef/0x480 kernel/locking/rwsem.c:1526
kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
d_revalidate fs/namei.c:929 [inline]
d_revalidate fs/namei.c:925 [inline]
lookup_fast+0x263/0x610 fs/namei.c:1778
walk_component+0x5b/0x5b0 fs/namei.c:2134
link_path_walk.part.0.constprop.0+0x685/0xd60 fs/namei.c:2503
link_path_walk fs/namei.c:2435 [inline]
path_openat+0x227/0x2d40 fs/namei.c:4035
do_filp_open+0x20b/0x470 fs/namei.c:4066
do_sys_openat2+0x11b/0x1d0 fs/open.c:1429
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+0x174/0x210 fs/open.c:1455
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f391328e261
RSP: 002b:00007ffccaa121f0 EFLAGS: 00000287
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000204 RCX: 00007f391328e261
RDX: 0000000000090800 RSI: 00007f3913310dd1 RDI: 00000000ffffff9c
RBP: 00007ffccaa1229c R08: 0000000000016734 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000287 R12: 00000000000000f9
R13: 0000000000000000 R14: 000000000007fab6 R15: 00007ffccaa122f0
INFO: task syz.1.1244:8549 blocked for more than 144 seconds.
Not tainted 6.15.0-rc6-syzkaller-00177-g882826f58b2c #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1244 state:D
stack:27640 pid:8549 tgid:8548 ppid:2950 task_flags:0x40044c flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x132a/0x3b00 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
rwsem_down_write_slowpath+0x524/0x1310 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1578
kernfs_remove_by_name_ns+0x3d/0x110 fs/kernfs/dir.c:1709
sysfs_remove_file include/linux/sysfs.h:794 [inline]
driver_remove_file drivers/base/driver.c:201 [inline]
driver_remove_file+0x4a/0x60 drivers/base/driver.c:197
remove_bind_files drivers/base/bus.c:605 [inline]
bus_remove_driver+0x224/0x2c0 drivers/base/bus.c:743
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1732
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:462
__fput+0x3ff/0xb70 fs/file_table.c:465
task_work_run+0x14d/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xafb/0x2c30 kernel/exit.c:953
do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
get_signal+0x2673/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [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+0x147/0x260 kernel/entry/common.c:218
do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f391328e56b
RSP: 002b:00007f39118f4f10 EFLAGS: 00000246
ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007f391328e56b
RDX: 00007f39118f5fe0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007f39118f5fe0 R08: 0000000000000000 R09: 00312e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000200000000080 R15: 00007f391331ba1e
Showing all locks held in the system:
4 locks held by kworker/0:1/10:
#0: ffff888100080d48
(
(wq_completion)events
){+.+.}-{0:0}
, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1: ffffc900000afd18
(kernfs_notify_work){+.+.}-{0:0}
, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
#2: ffff888100ac4a78 (&root->kernfs_supers_rwsem){++++}-{4:4}, at: kernfs_notify_workfn+0xf7/0xb20 fs/kernfs/file.c:913
#3:
ffff888100ac4948
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_notify_workfn+0xff/0xb20 fs/kernfs/file.c:914
1 lock held by khungtaskd/30:
#0:
ffffffff890c2840 (
rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6764
5 locks held by kworker/1:2/1113:
1 lock held by udevd/2839:
#0:
ffff888100ac4948
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
2 locks held by getty/2903:
#0: ffff8881124040a0
(&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc900000432f0 (
&ldata->atomic_read_lock){+.+.}-{4:4}
, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/2950:
#0: ffff888100ac4948
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1160
1 lock held by syz-executor/2951:
#0:
ffff888100ac4948
(
&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1160
1 lock held by syz-executor/2952:
#0:
ffff888100ac4948 (
&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1160
1 lock held by syz-executor/2953:
#0:
ffff888100ac4948
(&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1160
1 lock held by syz-executor/2958:
#0:
ffff888100ac4948 (&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0x397/0x740 fs/kernfs/dir.c:1160
1 lock held by udevd/5208:
#0:
ffff888100ac4948 (
&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
3 locks held by kworker/0:3/5227:
#0: ffff888100080d48
(
(wq_completion)events){+.+.}-{0:0}
, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
#1:
ffffc9001077fd18
(
(work_completion)(&gadget->work)){+.+.}-{0:0}
, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
#2:
ffff888100ac4948
(
&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_find_and_get_ns+0x2f/0x70 fs/kernfs/dir.c:933
4 locks held by kworker/1:4/5240:
4 locks held by udevd/5241:
#0:
ffff888118a792f0
(&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x12c0 fs/seq_file.c:182
#1: ffff888116890888
(&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff888116f50788 (kn->active#21){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3:
ffff88811ebc3198
(&dev->mutex
){....}-{4:4}
, at: device_lock_interruptible include/linux/device.h:927 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
3 locks held by kworker/1:6/5299:
1 lock held by udevd/5313:
#0: ffff888100ac4948
(&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
3 locks held by kworker/0:6/5382:
6 locks held by kworker/0:7/6126:
2 locks held by kworker/1:7/8012:
1 lock held by syz.2.1242/8543:
2 locks held by syz.1.1244/8549:
#0: ffff88810af74d78 (&dev->mutex){....}-{4:4}
, at: device_lock include/linux/device.h:922 [inline]
, at: __device_driver_lock drivers/base/dd.c:1094 [inline]
, at: device_release_driver_internal+0xa4/0x620 drivers/base/dd.c:1292
#1: ffff888100ac4948 (
&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3d/0x110 fs/kernfs/dir.c:1709
1 lock held by syz.0.1247/8555:
1 lock held by syz.4.1248/8558:
1 lock held by syz-executor/8559:
#0:
ffff888100ac4948
(
&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
1 lock held by syz-executor/8560:
#0:
ffff888100ac4948
(&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
1 lock held by syz-executor/8561:
#0: ffff888100ac4948
(&root->kernfs_rwsem
){++++}-{4:4}, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
1 lock held by syz-executor/8562:
#0: ffff888100ac4948 (&root->kernfs_rwsem){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
1 lock held by syz-executor/8563:
#0:
ffff888100ac4948
(&root->kernfs_rwsem
){++++}-{4:4}
, at: kernfs_dop_revalidate+0xa5/0x740 fs/kernfs/dir.c:1178
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.15.0-rc6-syzkaller-00177-g882826f58b2c #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:437
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 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:
imon 2-1:155.0: imon usb_rx_callback_intf0: status(-71): ignored
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2821 Comm: syslogd Not tainted 6.15.0-rc6-syzkaller-00177-g882826f58b2c #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: e9 ad 11 54 00 be 03 00 00 00 5b e9 02 d2 03 01 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 c8 74 e9 0a 65 8b 05 d9 74 e9 0a a9 00 01 ff 00 74 1d
RSP: 0018:ffffc900001a8078 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffffffff874901c1 RCX: ffffffff87211278
RDX: ffff8881165b1d40 RSI: ffffffff872112cc RDI: 0000000000000001
RBP: ffffc900001a8120 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000025 R11: 00000000002bf5a8 R12: 0000000000000025
R13: ffffffff874901c1 R14: ffffc900001a81a0 R15: dffffc0000000000
FS: 00007fdad3ab0c80(0000) GS:ffff8882692c2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c417ff8 CR3: 00000001165f6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
format_decode+0x17c/0xd40 lib/vsprintf.c:2598
vsnprintf+0x156/0x1160 lib/vsprintf.c:2795
sprintf+0xcc/0x100 lib/vsprintf.c:3015
print_time kernel/printk/printk.c:1381 [inline]
info_print_prefix+0x25a/0x350 kernel/printk/printk.c:1407
record_print_text+0x140/0x400 kernel/printk/printk.c:1456
printk_get_next_message+0x2d1/0x6d0 kernel/printk/printk.c:3024
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x6ea/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
dev_vprintk_emit drivers/base/core.c:4917 [inline]
dev_printk_emit+0xfa/0x140 drivers/base/core.c:4928
__dev_printk+0xf5/0x270 drivers/base/core.c:4940
_dev_warn+0xe4/0x120 drivers/base/core.c:4984
usb_rx_callback_intf0+0x11c/0x1a0 drivers/media/rc/imon.c:1768
__usb_hcd_giveback_urb+0x38a/0x6e0 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x180e/0x3a20 drivers/usb/gadget/udc/dummy_hcd.c:1994
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x1ff/0xad0 kernel/time/hrtimer.c:1825
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1842
handle_softirqs+0x205/0x8d0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5870
Code: 52 0c 0b 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 22 3f 1f 09 0f 82 74 02 00 00 8b 35 da 4a 1f 09 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 79 52 0c 0b 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc900018cf470 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff890c2840 RCX: 00000000a6adeee0
RDX: 0000000000000000 RSI: ffffffff88ab7813 RDI: ffffffff876851e0
RBP: 0000000000000002 R08: 6905576c6b3eca3d R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x37/0x50 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2380 [inline]
slab_free mm/slub.c:4642 [inline]
kfree+0x286/0x470 mm/slub.c:4841
skb_kfree_head net/core/skbuff.c:1058 [inline]
skb_free_head+0x108/0x1d0 net/core/skbuff.c:1070
skb_release_data+0x7a5/0x960 net/core/skbuff.c:1097
skb_release_all net/core/skbuff.c:1162 [inline]
__kfree_skb net/core/skbuff.c:1176 [inline]
consume_skb net/core/skbuff.c:1408 [inline]
consume_skb+0xbf/0x100 net/core/skbuff.c:1402
__unix_dgram_recvmsg+0x818/0xe60 net/unix/af_unix.c:2505
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2522
sock_recvmsg_nosec net/socket.c:1017 [inline]
sock_recvmsg+0x1f6/0x250 net/socket.c:1039
sock_read_iter+0x2b9/0x3b0 net/socket.c:1109
new_sync_read fs/read_write.c:489 [inline]
vfs_read+0xaa3/0xc70 fs/read_write.c:570
ksys_read+0x205/0x240 fs/read_write.c:713
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdad3c00407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffcfe3f30d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fdad3ab0c80 RCX: 00007fdad3c00407
RDX: 00000000000000ff RSI: 00005585bb87e300 RDI: 0000000000000000
RBP: 00005585bb87e2c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00005585bb87e332
R13: 0000000000000000 R14: 00005585bb87e300 R15: 00005585890f3d98