INFO: task udevd:5158 blocked for more than 143 seconds.
Not tainted 6.10.0-rc7-syzkaller-00139-g8a18fda0febb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:24760 pid:5158 tgid:5158 ppid:4543 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
kernfs_iop_lookup+0x93/0x390 fs/kernfs/dir.c:1200
__lookup_slow+0x28e/0x3f0 fs/namei.c:1692
lookup_slow+0x53/0x70 fs/namei.c:1709
walk_component fs/namei.c:2004 [inline]
link_path_walk+0x9ea/0xea0 fs/namei.c:2331
path_openat+0x257/0x35f0 fs/namei.c:3809
do_filp_open+0x235/0x490 fs/namei.c:3840
do_sys_openat2+0x13e/0x1d0 fs/open.c:1413
do_sys_open fs/open.c:1428 [inline]
__do_sys_openat fs/open.c:1444 [inline]
__se_sys_openat fs/open.c:1439 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1439
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: 0033:0x7f43b85169a4
RSP: 002b:00007fffddf3f5b0 EFLAGS: 00000246
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007f43b85169a4
RDX: 0000000000080000 RSI: 00007fffddf3f6e8 RDI: 00000000ffffff9c
RBP: 00007fffddf3f6e8 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 00005639e303eb42 R14: 0000000000000001 R15: 00005639e305a160
</TASK>
INFO: task udevd:5365 blocked for more than 144 seconds.
Not tainted 6.10.0-rc7-syzkaller-00139-g8a18fda0febb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:22048 pid:5365 tgid:5365 ppid:4543 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
__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]
uevent_show+0x17d/0x340 drivers/base/core.c:2743
dev_attr_show+0x57/0xc0 drivers/base/core.c:2437
sysfs_kf_seq_show+0x333/0x4c0 fs/sysfs/file.c:59
seq_read_iter+0x447/0xd60 fs/seq_file.c:230
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x9bf/0xbc0 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
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: 0033:0x7f43b8516b6a
RSP: 002b:00007fffddf3f608 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000563a0b336730 RCX: 00007f43b8516b6a
RDX: 0000000000001000 RSI: 0000563a0b353930 RDI: 0000000000000008
RBP: 0000563a0b336730 R08: 0000000000000008 R09: 0000000000000020
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007fffddf3fae8 R15: 000000000000000a
</TASK>
INFO: task syz.2.305:6101 blocked for more than 145 seconds.
Not tainted 6.10.0-rc7-syzkaller-00139-g8a18fda0febb #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.305 state:D stack:24672 pid:6101 tgid:6101 ppid:5288 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
kernfs_remove_by_name_ns+0x7a/0x160 fs/kernfs/dir.c:1689
driver_sysfs_remove drivers/base/dd.c:474 [inline]
__device_release_driver drivers/base/dd.c:1264 [inline]
device_release_driver_internal+0x3e3/0x7c0 drivers/base/dd.c:1293
driver_detach+0x1fb/0x2d0 drivers/base/dd.c:1356
bus_remove_driver+0x1f3/0x320 drivers/base/bus.c:742
usb_gadget_unregister_driver+0x4e/0x70 drivers/usb/gadget/udc/core.c:1733
raw_release+0xf9/0x1e0 drivers/usb/gadget/legacy/raw_gadget.c:462
__fput+0x24c/0x8a0 fs/file_table.c:422
task_work_run+0x251/0x310 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x168/0x360 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6861f75bd9
RSP: 002b:00007ffd759ac6a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000002072d RCX: 00007f6861f75bd9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: ffffffffffffffff R08: 0000000000000001 R09: 00000006759ac9cf
R10: 00007f6861e00000 R11: 0000000000000246 R12: 00007f6862103f6c
R13: 000000000000015e R14: 00007f6862105a60 R15: 00007f6862103f60
</TASK>
Showing all locks held in the system:
3 locks held by kworker/0:1/9:
#0: ffff888015078948
((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1: ffffc900000e7d00 ((linkwatch_work).work
){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2:
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
1 lock held by khungtaskd/30:
#0:
ffffffff8e333f20
(
rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:2/35:
#0: ffff888029be9948
(
(wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
(wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1:
ffffc90000ab7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
ffffc90000ab7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733
3 locks held by kworker/0:2/782:
#0:
ffff888015079948
(
(wq_completion)events_power_efficient
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3223 [inline]
, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1:
ffffc900030b7d00
((reg_check_chans).work){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3224 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
#2:
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x91/0xea0 net/wireless/reg.c:2478
2 locks held by kworker/u8:11/2863:
#0:
ffff888015081148
(
(wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
(wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
#1: ffffc900096afd00 ((work_completion)(&sub_info->work)){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3224 [inline]
, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
1 lock held by udevd/4543:
#0:
ffff888015ed6948
(
&root->kernfs_rwsem
){++++}-{3:3}
, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
2 locks held by getty/4861:
#0: ffff88802a1c50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1:
ffffc90002efe2f0
(
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5101:
#0:
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}
, at: tun_detach drivers/net/tun.c:698 [inline]
, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500
2 locks held by syz-executor/5100:
#0:
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500
#1:
ffffffff8e1ce5b0 (cpu_hotplug_lock){++++}-{0:0}, at: flush_all_backlogs net/core/dev.c:5984 [inline]
ffffffff8e1ce5b0 (cpu_hotplug_lock){++++}-{0:0}, at: unregister_netdevice_many_notify+0x607/0x16b0 net/core/dev.c:11201
2 locks held by udevd/5158:
#0:
ffff888061c51fb0
(
&type->i_mutex_dir_key
#4
){++++}-{3:3}
, at: inode_lock_shared include/linux/fs.h:801 [inline]
, at: lookup_slow+0x45/0x70 fs/namei.c:1708
#1: ffff888015ed6948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_lookup+0x93/0x390 fs/kernfs/dir.c:1200
6 locks held by kworker/1:6/5164:
4 locks held by udevd/5365:
#0:
ffff88807d486c30 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xb7/0xd60 fs/seq_file.c:182
#1: ffff88802ce50c88 (&of->mutex#2
){+.+.}-{3:3}
, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff8880648c5a58 (kn->active#5){.+.+}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff88802b6e5190
(
&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
&dev->mutex){....}-{3:3}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2743
3 locks held by kworker/1:7/5663:
2 locks held by syz.2.305/6101:
#0:
ffff8880237bcd78 (&dev->mutex){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: __device_driver_lock drivers/base/dd.c:1093 [inline]
, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1290
#1:
ffff888015ed6948 (&root->kernfs_rwsem){++++}-{3:3}
, at: kernfs_remove_by_name_ns+0x7a/0x160 fs/kernfs/dir.c:1689
1 lock held by modprobe/6126:
#0: ffff888015ed6948 (&root->kernfs_rwsem){++++}-{3:3}
, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
1 lock held by syz.3.322/6160:
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500
10 locks held by syz.4.325/6177:
1 lock held by syz.5.326/6173:
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500
1 lock held by syz-executor/6175:
#0:
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6179:
#0:
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6182:
#0: ffffffff8f5ea748 (rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6186:
#0: ffff888015ed6948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xd4/0x560 fs/kernfs/dir.c:1159
1 lock held by syz-executor/6187:
#0:
ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6189:
#0: ffffffff8f5ea748 (
rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6192:
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6195:
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6198:
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f5ea748 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6202:
#0:
ffffffff8f5ea748
(rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
(rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/6204:
#0:
ffffffff8f5ea748
(
rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc7-syzkaller-00139-g8a18fda0febb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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+0xfde/0x1020 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Sending NMI from CPU 0 to CPUs 1:
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
NMI backtrace for cpu 1
CPU: 1 PID: 6177 Comm: syz.4.325 Not tainted 6.10.0-rc7-syzkaller-00139-g8a18fda0febb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:406
Code: 20 01 5a fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 f1 c6 bf fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d e9 d7 19 74 06 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc90000a17558 EFLAGS: 00000002
RAX: 1ffffffff295a500 RBX: ffffffff94ad2ee0 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000026130 RDI: 0000000000026131
RBP: 0000000000000000 R08: ffffffff853c26f6 R09: 1ffff11003e85046
R10: dffffc0000000000 R11: ffffffff853c26b0 R12: dffffc0000000000
R13: 00000000000026e9 R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23ee2ce2d8 CR3: 000000000e132000 CR4: 0000000000350ef0
Call Trace:
<NMI>
</NMI>
<IRQ>
serial_in drivers/tty/serial/8250/8250.h:117 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2068 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline]
serial8250_console_write+0x109b/0x1770 drivers/tty/serial/8250/8250_port.c:3393
console_emit_next_record kernel/printk/printk.c:2913 [inline]
console_flush_all+0x867/0xfd0 kernel/printk/printk.c:2979
console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3048
vprintk_emit+0x5a6/0x770 kernel/printk/printk.c:2348
_printk+0xd5/0x120 kernel/printk/printk.c:2373
int_irq+0x1bd/0x250 drivers/media/usb/gspca/gspca.c:104
__usb_hcd_giveback_urb+0x42e/0x6e0 drivers/usb/core/hcd.c:1650
dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x112/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:arch_stack_walk+0x128/0x1b0 arch/x86/kernel/stacktrace.c:27
Code: e8 2d ad 09 00 8b 9d 70 ff ff ff 31 ff 89 de e8 ce b9 5e 00 85 db 74 4b 4c 8d bd 70 ff ff ff 4c 89 ff e8 8b 7b 09 00 48 89 c3 <31> ff 48 89 c6 e8 4e ba 5e 00 48 85 db 74 31 4c 89 f7 48 89 de 4d
RSP: 0018:ffffc90000a183e0 EFLAGS: 00000246
RAX: ffffffff8b864f59 RBX: ffffffff8b864f59 RCX: ffff888026ea9e00
RDX: 0000000000000101 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000a18470 R08: ffffffff8140ee98 R09: ffffffff8141095f
R10: 0000000000000003 R11: ffff888026ea9e00 R12: ffff888026ea9e00
R13: ffffffff8181de00 R14: ffffc90000a184c0 R15: ffffc90000a183e0
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3940 [inline]
slab_alloc_node mm/slub.c:4002 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4045
kmalloc_reserve+0xa8/0x2a0 net/core/skbuff.c:575
__alloc_skb+0x1f3/0x440 net/core/skbuff.c:666
__netdev_alloc_skb+0x105/0x560 net/core/skbuff.c:730
netdev_alloc_skb include/linux/skbuff.h:3319 [inline]
dev_alloc_skb include/linux/skbuff.h:3332 [inline]
__ieee80211_beacon_get+0x998/0x15c0 net/mac80211/tx.c:5471
ieee80211_beacon_get_tim+0xb4/0x320 net/mac80211/tx.c:5593
ieee80211_beacon_get include/net/mac80211.h:5562 [inline]
mac80211_hwsim_beacon_tx+0x39d/0x850 drivers/net/wireless/virtual/mac80211_hwsim.c:2302
__iterate_interfaces+0x225/0x4c0 net/mac80211/util.c:772
ieee80211_iterate_active_interfaces_atomic+0xd8/0x170 net/mac80211/util.c:808
mac80211_hwsim_beacon+0xd4/0x1f0 drivers/net/wireless/virtual/mac80211_hwsim.c:2336
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x59d/0xd50 kernel/time/hrtimer.c:1753
hrtimer_run_softirq+0x19a/0x2c0 kernel/time/hrtimer.c:1770
handle_softirqs+0x2c6/0x970 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:ptep_get include/linux/pgtable.h:317 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1592 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1724 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1753 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1774 [inline]
RIP: 0010:unmap_page_range+0x99f/0x40f0 mm/memory.c:1795
Code: 00 c7 84 24 a4 00 00 00 00 00 00 00 4c 89 fb 49 89 dc 49 c1 ec 03 43 80 3c 2c 00 74 08 48 89 df e8 76 dc 19 00 48 89 5c 24 48 <4c> 8b 3b 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 48
RSP: 0018:ffffc90003fef360 EFLAGS: 00000246
RAX: ffffffff81e226d4 RBX: ffff88806be3fae0 RCX: ffff888026ea9e00
RDX: 0000000000000000 RSI: 00000000000001fd RDI: 000000000000014f
RBP: ffffc90003fef690 R08: ffffffff81e8c14d R09: 1ffffd40002e04e6
R10: dffffc0000000000 R11: fffff940002e04e7 R12: 1ffff1100d7c7f5c
R13: dffffc0000000000 R14: ffffc90003fef5e0 R15: 0000000000000001
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1885
exit_mmap+0x264/0xc80 mm/mmap.c:3341
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:567
do_exit+0x9aa/0x27e0 kernel/exit.c:863
do_group_exit+0x207/0x2c0 kernel/exit.c:1025
get_signal+0x16a1/0x1740 kernel/signal.c:2909
arch_do_signal_or_restart+0x96/0x860 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+0xc9/0x360 kernel/entry/common.c:218
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
sched: RT throttling activated
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
gspca_pac7302 3-1:0.0: URB error -71, resubmitting
gspca_pac7302 3-1:0.0: URB error -71, resubmitting