INFO: task kworker/u8:6:1049 blocked for more than 143 seconds.
Not tainted 6.10.0-rc6-next-20240702-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:6 state:D stack:19992 pid:1049 tgid:1049 ppid:2 flags:0x00004000
Workqueue: events_unbound call_usermodehelper_exec_work
Call Trace:
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6600
__schedule_loop kernel/sched/core.c:6677 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6692
percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
__percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
cgroup_threadgroup_change_begin include/linux/cgroup-defs.h:790 [inline]
cgroup_css_set_fork kernel/cgroup/cgroup.c:6417 [inline]
cgroup_can_fork+0xb97/0xc80 kernel/cgroup/cgroup.c:6546
copy_process+0x21c0/0x3d70 kernel/fork.c:2472
kernel_clone+0x226/0x8f0 kernel/fork.c:2788
user_mode_thread+0x132/0x1a0 kernel/fork.c:2866
call_usermodehelper_exec_sync kernel/umh.c:133 [inline]
call_usermodehelper_exec_work+0x9b/0x230 kernel/umh.c:164
process_one_work kernel/workqueue.c:3224 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305
worker_thread+0x86d/0xd40 kernel/workqueue.c:3383
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
INFO: task syz-executor:8578 blocked for more than 144 seconds.
Not tainted 6.10.0-rc6-next-20240702-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:24160 pid:8578 tgid:8578 ppid:5078 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6600
__schedule_loop kernel/sched/core.c:6677 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6692
percpu_rwsem_wait+0x3c2/0x450 kernel/locking/percpu-rwsem.c:162
__percpu_down_read+0xee/0x130 kernel/locking/percpu-rwsem.c:177
percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
cgroup_threadgroup_change_begin include/linux/cgroup-defs.h:790 [inline]
exit_signals+0x4a9/0x5c0 kernel/signal.c:3014
do_exit+0x6b4/0x27f0 kernel/exit.c:839
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x16a1/0x1740 kernel/signal.c:2923
arch_do_signal_or_restart+0x96/0x830 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb89696be53
RSP: 002b:00007ffdbb9002e8 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000002184 RCX: 00007fb89696be53
RDX: 0000000040000000 RSI: 00007ffdbb9002fc RDI: 00000000ffffffff
RBP: 00007ffdbb9002fc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000c
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000009
INFO: task syz-executor:8688 blocked for more than 145 seconds.
Not tainted 6.10.0-rc6-next-20240702-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:19824 pid:8688 tgid:8688 ppid:8680 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6600
__schedule_loop kernel/sched/core.c:6677 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6692
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6749
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
device_lock include/linux/device.h:1009 [inline]
device_del+0xa6/0x9b0 drivers/base/core.c:3830
device_unregister+0x20/0xc0 drivers/base/core.c:3909
nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline]
del_device_store+0x363/0x480 drivers/net/netdevsim/bus.c:226
kernfs_fop_write_iter+0x3a1/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1438b7471f
RSP: 002b:00007ffce9d7c660 EFLAGS: 00000293
ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f1438b7471f
RDX: 0000000000000001 RSI: 00007ffce9d7c6b0 RDI: 0000000000000005
RBP: 00007f1438be4579 R08: 0000000000000000 R09: 00007ffce9d7c4b7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffce9d7c6b0 R14: 00007f1439834620 R15: 0000000000000003
Showing all locks held in the system:
3 locks held by kworker/u8:1/12:
#0:
ffff888029d5c148
(
(wq_completion)ipv6_addrconf
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3199 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1: ffffc90000117d00 (
(work_completion)(&(&net->ipv6.addr_chk_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3200 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2:
ffffffff8f5fed08
(
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733
1 lock held by khungtaskd/30:
#0:
ffffffff8e335860 (rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:333 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:845 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6704
6 locks held by kworker/u8:2/35:
#0:
ffff888015edd948
((wq_completion)netns
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3199 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1:
ffffc90000ab7d00
(
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3200 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2: ffffffff8f5f2190
(
pernet_ops_rwsem
){++++}-{3:3}
, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594
#3:
ffff88806201f0e8
(
&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
, at: devlink_pernet_pre_exit+0x13b/0x440 net/devlink/core.c:506
#4:
ffff888061ae8250 (&devlink->lock_key#17){+.+.}-{3:3}
, at: devl_lock net/devlink/core.c:276 [inline]
, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
, at: devlink_pernet_pre_exit+0x14d/0x440 net/devlink/core.c:506
#5: ffffffff8f5fed08 (
rtnl_mutex
){+.+.}-{3:3}
, at: netdev_wait_allrefs_any net/core/dev.c:10617 [inline]
, at: netdev_run_todo+0x7b2/0x1000 net/core/dev.c:10736
2 locks held by kworker/u8:4/61:
#0: ffff888015089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
#0: ffff888015089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1: ffffc900015cfd00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline]
#1: ffffc900015cfd00 ((work_completion)(&pool->idle_cull_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
3 locks held by kworker/u8:6/1049:
#0: ffff888015089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
#0: ffff888015089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1:
ffffc900041bfd00
((work_completion)(&sub_info->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3200 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2:
ffffffff8e363ad0
(cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x21c0/0x3d70 kernel/fork.c:2472
2 locks held by kworker/u8:7/2395:
#0:
ffff888015089148
((wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3199 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1: ffffc900090cfd00
((work_completion)(&pool->idle_cull_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3200 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
3 locks held by kworker/1:2/2528:
#0:
ffff888015080948
((wq_completion)events
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3199 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1:
ffffc9000948fd00
(
deferred_process_work){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3200 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2:
ffffffff8f5fed08
(rtnl_mutex
){+.+.}-{3:3}
, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by dhcpcd/4760:
#0:
ffffffff8e363ad0
(
cgroup_threadgroup_rwsem
){++++}-{0:0}
, at: copy_process+0x21c0/0x3d70 kernel/fork.c:2472
2 locks held by getty/4847:
#0:
ffff88802a7860a0 (
&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000311b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}
, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
1 lock held by kworker/u9:9/5105:
#0:
ffffffff8e363ad0
(cgroup_threadgroup_rwsem
){++++}-{0:0}
, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
3 locks held by kworker/1:5/5140:
#0:
ffff888015081948
(
(wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
(wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1:
ffffc9000408fd00
(
(reg_check_chans).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3200 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2: ffffffff8f5fed08 (rtnl_mutex){+.+.}-{3:3}
, at: reg_check_chans_work+0x99/0xfd0 net/wireless/reg.c:2480
3 locks held by kworker/0:4/5141:
3 locks held by kworker/0:6/5144:
1 lock held by kworker/1:7/5202:
#0: ffffffff8e363ad0
(
cgroup_threadgroup_rwsem){++++}-{0:0}
, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
1 lock held by kworker/0:7/5205:
#0:
ffffffff8e363ad0
(
cgroup_threadgroup_rwsem
){++++}-{0:0}
, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
2 locks held by kworker/u8:9/5226:
#0:
ffff888015089148
(
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3199 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1:
ffffc9000454fd00
(
(work_completion)(&pool->idle_cull_work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3200 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
1 lock held by syz-executor/8578:
#0:
ffffffff8e363ad0
(
cgroup_threadgroup_rwsem){++++}-{0:0}
, at: do_exit+0x6b4/0x27f0 kernel/exit.c:839
6 locks held by syz-executor/8595:
5 locks held by syz-executor/8688:
#0:
ffff88802f500420
(
sb_writers
#8
){.+.+}-{0:0}
, at: file_start_write include/linux/fs.h:2876 [inline]
, at: vfs_write+0x227/0xc90 fs/read_write.c:586
#1:
ffff88802e91f488
(
&of->mutex){+.+.}-{3:3}
, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
#2: ffff888022c65968 (kn->active#49){.+.+}-{0:0}
, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
#3: ffffffff8ef04908 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff88806201f0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff88806201f0e8 (&dev->mutex){....}-{3:3}, at: device_del+0xa6/0x9b0 drivers/base/core.c:3830
1 lock held by syz.4.843/8698:
1 lock held by syz.3.845/8720:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc6-next-20240702-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfee/0x1030 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8720 Comm: syz.3.845 Not tainted 6.10.0-rc6-next-20240702-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__lock_acquire+0x45f/0x2000 kernel/locking/lockdep.c:5136
Code: e1 01 c1 e1 12 c1 e0 14 31 d2 83 7c 24 68 00 0f 95 c2 c1 e2 13 41 c1 e7 15 41 09 d7 41 09 c7 41 09 cf 41 09 ff 48 8b 44 24 28 <0f> b6 04 30 84 c0 0f 85 3d 13 00 00 44 8b ac 24 e0 00 00 00 48 8b
RSP: 0018:ffffc90003107990 EFLAGS: 00000006
RAX: 1ffff1100519dca0 RBX: 00000000000001b4 RCX: 0000000000040000
RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00000000000101b4
RBP: 0000000000000000 R08: ffff888028cee4e0 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f5efd6 R12: 00000000000001b4
R13: ffff88802f526098 R14: ffff888028cee4d8 R15: 00000000000501b4
FS: 00007fb89772b6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 000000005f5fc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5816
__might_fault+0xc6/0x120 mm/memory.c:6376
__clear_user arch/x86/include/asm/uaccess_64.h:165 [inline]
clear_user arch/x86/include/asm/uaccess_64.h:189 [inline]
copy_siginfo_to_user+0x52/0xa0 kernel/signal.c:3394
x64_setup_rt_frame+0x75d/0xcc0 arch/x86/kernel/signal_64.c:194
setup_rt_frame arch/x86/kernel/signal.c:223 [inline]
handle_signal arch/x86/kernel/signal.c:267 [inline]
arch_do_signal_or_restart+0x435/0x830 arch/x86/kernel/signal.c:312
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb896975b97
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 <0f> 05 48 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007fb89772b0f8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fb896b03f68 RCX: 00007fb896975b99
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb896b03f68
RBP: 00007fb896b03f60 R08: 00007fb89772b6c0 R09: 00007fb89772b6c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb896b03f6c