Hello,
syzbot found the following issue on:
HEAD commit: e42b1a9a2557 Merge tag 'spi-fix-v6.12-rc5' of git://git.ke..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=114d615f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=4340261e4e9f37fc
dashboard link: https://syzkaller.appspot.com/bug?extid=73582d08864d8268b6fd
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130d3687980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1274ca30580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d0782982165a/disk-e42b1a9a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f8ab91eac7df/vmlinux-e42b1a9a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/debece1170ee/bzImage-e42b1a9a.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+73582d08864d8268b6fd@xxxxxxxxxxxxxxxxxxxxxxxxx
INFO: task kworker/0:2:965 blocked for more than 143 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2 state:D stack:24576 pid:965 tgid:965 ppid:2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
snd_card_free+0x128/0x190 sound/core/init.c:653
snd_usx2y_disconnect+0x194/0x1f0 sound/usb/usx2y/usbusx2y.c:425
usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461
device_remove drivers/base/dd.c:569 [inline]
device_remove+0x122/0x170 drivers/base/dd.c:561
__device_release_driver drivers/base/dd.c:1273 [inline]
device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296
bus_remove_device+0x22f/0x420 drivers/base/bus.c:576
device_del+0x396/0x9f0 drivers/base/core.c:3864
usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418
usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2304
hub_port_connect drivers/usb/core/hub.c:5361 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
port_event drivers/usb/core/hub.c:5821 [inline]
hub_event+0x1da5/0x4e10 drivers/usb/core/hub.c:5903
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
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
</TASK>
INFO: task kworker/1:2:2143 blocked for more than 143 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2 state:D stack:23744 pid:2143 tgid:2143 ppid:2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6782
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
snd_card_free+0x128/0x190 sound/core/init.c:653
snd_usx2y_disconnect+0x194/0x1f0 sound/usb/usx2y/usbusx2y.c:425
usb_unbind_interface+0x1e8/0x970 drivers/usb/core/driver.c:461
device_remove drivers/base/dd.c:569 [inline]
device_remove+0x122/0x170 drivers/base/dd.c:561
__device_release_driver drivers/base/dd.c:1273 [inline]
device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296
bus_remove_device+0x22f/0x420 drivers/base/bus.c:576
device_del+0x396/0x9f0 drivers/base/core.c:3864
usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418
usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2304
hub_port_connect drivers/usb/core/hub.c:5361 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
port_event drivers/usb/core/hub.c:5821 [inline]
hub_event+0x1da5/0x4e10 drivers/usb/core/hub.c:5903
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
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
</TASK>
INFO: task syz-executor413:5880 blocked for more than 144 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor413 state:D stack:26352 pid:5880 tgid:5880 ppid:5851 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 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]
usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
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: 0033:0x7f7a45e945a9
RSP: 002b:00007ffea42b3558 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7a45e945a9
RDX: 0000000000000000 RSI: 00000000c0105512 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00312e6364755f79 R09: 00000000000000a0
R10: 000000000000001f R11: 0000000000000246 R12: 0000000000044933
R13: 00007ffea42b356c R14: 00007ffea42b3580 R15: 00007ffea42b3570
</TASK>
INFO: task syz-executor413:5881 blocked for more than 144 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor413 state:D stack:26640 pid:5881 tgid:5881 ppid:5853 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 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]
usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
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: 0033:0x7f7a45e945a9
RSP: 002b:00007ffea42b3558 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7a45e945a9
RDX: 0000000000000000 RSI: 00000000c0105512 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00322e6364755f79 R09: 00000000000000a0
R10: 000000000000001f R11: 0000000000000246 R12: 000000000004493f
R13: 00007ffea42b356c R14: 00007ffea42b3580 R15: 00007ffea42b3570
</TASK>
INFO: task syz-executor413:5882 blocked for more than 144 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor413 state:D stack:26912 pid:5882 tgid:5882 ppid:5856 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 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]
usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
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: 0033:0x7f7a45e945a9
RSP: 002b:00007ffea42b3558 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7a45e945a9
RDX: 0000000000000000 RSI: 00000000c0105512 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00332e6364755f79 R09: 00000000000000a0
R10: 000000000000001f R11: 0000000000000246 R12: 000000000004494f
R13: 00007ffea42b356c R14: 00007ffea42b3580 R15: 00007ffea42b3570
</TASK>
INFO: task syz-executor413:5883 blocked for more than 144 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor413 state:D stack:28176 pid:5883 tgid:5883 ppid:5850 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 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]
usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
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: 0033:0x7f7a45e945a9
RSP: 002b:00007ffea42b3558 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7a45e945a9
RDX: 0000000000000000 RSI: 00000000c0105512 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00302e6364755f79 R09: 00000000000000a0
R10: 000000000000001f R11: 0000000000000246 R12: 0000000000044927
R13: 00007ffea42b356c R14: 00007ffea42b3580 R15: 00007ffea42b3570
</TASK>
INFO: task syz-executor413:5884 blocked for more than 145 seconds.
Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor413 state:D stack:27200 pid:5884 tgid:5884 ppid:5857 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0xe55/0x5730 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]
usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x18f/0x220 fs/ioctl.c:893
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: 0033:0x7f7a45e945a9
RSP: 002b:00007ffea42b3558 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7a45e945a9
RDX: 0000000000000000 RSI: 00000000c0105512 RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00342e6364755f79 R09: 00000000000000a0
R10: 000000000000001f R11: 0000000000000246 R12: 0000000000044952
R13: 00007ffea42b356c R14: 00007ffea42b3580 R15: 00007ffea42b3570
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
5 locks held by kworker/0:2/965:
#0: ffff888022ef1d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc90004317d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff888144f04190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff888144f04190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e10 drivers/usb/core/hub.c:5849
#3: ffff888073193190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff888073193190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295
#4: ffff888076f82160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff888076f82160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff888076f82160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
5 locks held by kworker/1:2/2143:
#0: ffff888022ef1d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000540fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e10 drivers/usb/core/hub.c:5849
#3: ffff888031f37190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff888031f37190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295
#4: ffff88802fe31160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff88802fe31160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff88802fe31160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1293
2 locks held by getty/5579:
#0: ffff8880357d80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz-executor413/5880:
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
1 lock held by syz-executor413/5881:
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
1 lock held by syz-executor413/5882:
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
1 lock held by syz-executor413/5883:
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
1 lock held by syz-executor413/5884:
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
#0: ffff888144bf4190 (&dev->mutex){....}-{3:3}, at: usbdev_ioctl+0x1a9/0x4010 drivers/usb/core/devio.c:2824
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__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
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 63 Comm: kworker/u8:4 Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:call_function_single_prep_ipi+0x12e/0x1b0 kernel/sched/core.c:3806
Code: be 08 00 00 00 4c 89 ef e8 6f b4 91 00 48 8b 44 24 20 48 89 c2 48 83 ca 08 f0 48 0f b1 13 75 c3 44 89 e7 e8 14 ca fe ff 31 d2 <48> b8 00 00 00 00 00 fc ff df 48 c7 44 05 00 00 00 00 00 48 8b 44
RSP: 0018:ffffc900015d7910 EFLAGS: 00000246
RAX: 0000000000004000 RBX: ffffffff8de957c0 RCX: ffffffff8181686a
RDX: 0000000000000001 RSI: ffffffff81816945 RDI: ffff8880b863f990
RBP: 1ffff920002baf22 R08: 0000000000000005 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc900015d7930 R14: ffff8880b8740110 R15: ffff8880b8740100
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5a4d87b580 CR3: 000000000df7c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
send_call_function_single_ipi kernel/smp.c:115 [inline]
smp_call_function_many_cond+0xcee/0x1300 kernel/smp.c:866
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2085 [inline]
text_poke_bp_batch+0x659/0x760 arch/x86/kernel/alternative.c:2295
text_poke_flush arch/x86/kernel/alternative.c:2486 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2483 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2493
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:920
static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210
static_key_enable+0x1a/0x20 kernel/jump_label.c:223
toggle_allocation_gate mm/kfence/core.c:849 [inline]
toggle_allocation_gate+0xfc/0x260 mm/kfence/core.c:841
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
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
</TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.541 msecs
---
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