INFO: task syz.1.2836:17392 blocked for more than 143 seconds.
Not tainted 6.12.0-rc4-syzkaller-00281-g284a2f899676 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2836 state:D stack:25024 pid:17392 tgid:17391 ppid:5840 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x185a/0x4b70 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 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+0x6a7/0xd70 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+0x268/0x6120 drivers/usb/core/devio.c:2824
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
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: 0033:0x7f20fe77e719
RSP: 002b:00007f20ff5d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f20fe935f80 RCX: 00007f20fe77e719
RDX: 0000000000000000 RSI: 0000000080045505 RDI: 0000000000000003
RBP: 00007f20fe7f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f20fe935f80 R15: 00007fffa6f27ca8
</TASK>
INFO: task syz.1.2836:17400 blocked for more than 144 seconds.
Not tainted 6.12.0-rc4-syzkaller-00281-g284a2f899676 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2836 state:D stack:27248 pid:17400 tgid:17391 ppid:5840 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x185a/0x4b70 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 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+0x6a7/0xd70 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+0x268/0x6120 drivers/usb/core/devio.c:2824
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
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: 0033:0x7f20fe77e719
RSP: 002b:00007f20ff5b4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f20fe936058 RCX: 00007f20fe77e719
RDX: 0000000020000080 RSI: 0000000080045519 RDI: 0000000000000003
RBP: 00007f20fe7f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f20fe936058 R15: 00007fffa6f27ca8
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/5592:
#0: ffff888031a5b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032532f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
4 locks held by kworker/1:5/5882:
3 locks held by kworker/u8:10/6594:
6 locks held by kworker/1:3/15438:
#0: ffff888020a96548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff888020a96548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90002d8fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90002d8fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#2: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5849
#3: ffff88807f7f3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff88807f7f3190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#4: ffff88806c551160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff88806c551160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#5: ffffffff8e7e1030 (umhelper_sem){++++}-{3:3}, at: usermodehelper_read_trylock+0x140/0x300 kernel/umh.c:215
1 lock held by syz.1.2836/17392:
#0: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#0: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
#0: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: usbdev_ioctl+0x268/0x6120 drivers/usb/core/devio.c:2824
1 lock held by syz.1.2836/17400:
#0: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
#0: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2608 [inline]
#0: ffff888144fcd190 (&dev->mutex){....}-{3:3}, at: usbdev_ioctl+0x268/0x6120 drivers/usb/core/devio.c:2824
1 lock held by syz.8.3457/19441:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc4-syzkaller-00281-g284a2f899676 #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+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+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 19434 Comm: syz.8.3457 Not tainted 6.12.0-rc4-syzkaller-00281-g284a2f899676 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:103 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x64/0x290 mm/kasan/generic.c:189
Code: 48 c1 eb 03 49 ba 00 00 00 00 00 fc ff df 4e 8d 1c 13 49 ff c8 4d 89 c1 49 c1 e9 03 49 be 01 00 00 00 00 fc ff df 4f 8d 3c 31 <4c> 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c
RSP: 0018:ffffc9000cb67430 EFLAGS: 00000807
RAX: 0000000000000001 RBX: 1ffffffff2037aed RCX: ffffffff819cb00c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901bd768
RBP: 000000000001ffff R08: ffffffff901bd76f R09: 1ffffffff2037aed
R10: dffffc0000000000 R11: fffffbfff2037aed R12: dffffc0000000000
R13: 1ffff9200196ce90 R14: dffffc0000000001 R15: fffffbfff2037aee
FS: 00007f25b52346c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f48a6709178 CR3: 000000008fa3e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
cpumask_test_cpu include/linux/cpumask.h:570 [inline]
cpu_online include/linux/cpumask.h:1117 [inline]
trace_irq_enable+0x2c/0x120 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
_raw_spin_unlock_irqrestore+0x8f/0x140 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
prepare_to_wait_exclusive+0xd0/0x230 kernel/sched/wait.c:256
unix_wait_for_peer+0x162/0x340 net/unix/af_unix.c:1520
unix_dgram_sendmsg+0x127f/0x1f80 net/unix/af_unix.c:2131
sock_sendmsg_nosec net/socket.c:729 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:744
____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607
___sys_sendmsg net/socket.c:2661 [inline]
__sys_sendmmsg+0x3ab/0x730 net/socket.c:2747
__do_sys_sendmmsg net/socket.c:2776 [inline]
__se_sys_sendmmsg net/socket.c:2773 [inline]
__x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2773
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: 0033:0x7f25b437e719
Code: 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 01 48
RSP: 002b:00007f25b5234038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f25b4535f80 RCX: 00007f25b437e719
RDX: 0000000000000651 RSI: 0000000020000000 RDI: 0000000000000007
RBP: 00007f25b43f132e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f25b4535f80 R15: 00007ffebcb3aa58
</TASK>