INFO: task syz.3.20:4512 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20 state:D stack:26704 pid:4512 ppid:4412 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6698
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x548/0xae0 kernel/locking/mutex.c:747
class_mutex_constructor include/linux/mutex.h:250 [inline]
nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x30b/0x400 fs/configfs/file.c:229
call_write_iter include/linux/fs.h:2271 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x482/0x9a0 fs/read_write.c:584
ksys_write+0x14d/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8e0399e159
RSP: 002b:00007fff46703cf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8e03c25fa0 RCX: 00007f8e0399e159
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000003
RBP: 00007f8e03a3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e03c25fac R14: 00007f8e03c25fa0 R15: 00007f8e03c25fa0
</TASK>
INFO: task syz.1.18:4513 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.18 state:D stack:26704 pid:4513 ppid:4403 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6698
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x548/0xae0 kernel/locking/mutex.c:747
class_mutex_constructor include/linux/mutex.h:250 [inline]
nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x30b/0x400 fs/configfs/file.c:229
call_write_iter include/linux/fs.h:2271 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x482/0x9a0 fs/read_write.c:584
ksys_write+0x14d/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7efe3499e159
RSP: 002b:00007ffe5dacbea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007efe34c25fa0 RCX: 00007efe3499e159
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000003
RBP: 00007efe34a3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efe34c25fac R14: 00007efe34c25fa0 R15: 00007efe34c25fa0
</TASK>
INFO: task syz.4.21:4514 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21 state:D stack:26704 pid:4514 ppid:4416 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6698
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x548/0xae0 kernel/locking/mutex.c:747
class_mutex_constructor include/linux/mutex.h:250 [inline]
nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x30b/0x400 fs/configfs/file.c:229
call_write_iter include/linux/fs.h:2271 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x482/0x9a0 fs/read_write.c:584
ksys_write+0x14d/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb67059e159
RSP: 002b:00007ffd120a3118 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb670825fa0 RCX: 00007fb67059e159
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000003
RBP: 00007fb67063506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb670825fac R14: 00007fb670825fa0 R15: 00007fb670825fa0
</TASK>
INFO: task syz.0.17:4515 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:26704 pid:4515 ppid:4402 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5246 [inline]
__schedule+0x107f/0x4030 kernel/sched/core.c:6563
schedule+0xb9/0x180 kernel/sched/core.c:6639
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6698
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x548/0xae0 kernel/locking/mutex.c:747
class_mutex_constructor include/linux/mutex.h:250 [inline]
nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
flush_write_buffer fs/configfs/file.c:207 [inline]
configfs_write_iter+0x30b/0x400 fs/configfs/file.c:229
call_write_iter include/linux/fs.h:2271 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x482/0x9a0 fs/read_write.c:584
ksys_write+0x14d/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc07df9e159
RSP: 002b:00007ffec8d0e948 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc07e225fa0 RCX: 00007fc07df9e159
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000003
RBP: 00007fc07e03506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc07e225fac R14: 00007fc07e225fa0 R15: 00007fc07e225fa0
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2e230 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xef0 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2ea50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xef0 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
#0: ffffffff8cb2d8a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d8a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d8a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6669
2 locks held by kworker/u4:2/32:
2 locks held by getty/4029:
#0: ffff88814d8ee098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41e/0x1360 drivers/tty/n_tty.c:2198
2 locks held by kworker/1:4/4377:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
#1: ffffc90004137d00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
3 locks held by kworker/1:10/4385:
#0: ffff88802e8dc138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
#1: ffffc900041d7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x1500 net/ipv6/addrconf.c:4146
3 locks held by kworker/1:11/4386:
5 locks held by syz.2.19/4449:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888020aa4288 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_power_store+0xd8/0x380 drivers/block/null_blk/main.c:469
#4: ffff88807a8c34c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf7/0x780 block/bdev.c:926
3 locks held by kworker/0:8/4455:
#0: ffff88802e8dc138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
#1: ffffc900034a7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b4/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x1500 net/ipv6/addrconf.c:4146
2 locks held by kworker/u4:8/4493:
4 locks held by syz.3.20/4512:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888141706888 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.1.18/4513:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807e681c88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.4.21/4514:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807d1a6688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.0.17/4515:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807d1a6488 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.5.22/4540:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888026a9ae88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.8.25/4618:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888077679888 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.7.24/4619:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88802e17fc88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.6.23/4620:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888078b03e88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.9.26/4621:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88802f6e9288 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.2.27/4634:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807e422688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.3.29/4694:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888076896488 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.1.28/4701:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88805d444288 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.4.30/4702:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888074074c88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.0.31/4703:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807288d088 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.5.32/4714:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888027e47e88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.7.33/4778:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff8880541c6688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.8.34/4779:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888059880688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.9.35/4809:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807aa88a88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.2.37/4811:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888018488288 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.6.36/4812:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88805a0f8888 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.1.38/4835:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88805bb86888 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.3.39/4847:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807b6ffc88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.4.40/4876:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888051924688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.0.41/4892:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff8880481ef488 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.5.42/4893:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888027c86c88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.7.43/4921:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807a4c6088 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.8.44/4938:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888054476a88 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.9.45/4963:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff88807bb4c488 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.2.47/4985:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff8880493e4888 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.6.46/4989:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff8880515dc088 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.1.48/5006:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888055fa2688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.3.49/5013:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888056680688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
4 locks held by syz.4.50/5037:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff888047f40288 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
1 lock held by syz-executor/5048:
#0: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x80d/0xfb0 net/core/rtnetlink.c:6163
2 locks held by syz-executor/5062:
#0: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x80d/0xfb0 net/core/rtnetlink.c:6163
#1: ffffffff8cb33578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8cb33578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2ec/0x890 kernel/rcu/tree_exp.h:962
4 locks held by syz.0.51/5064:
#0: ffff8880185ca460 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x270/0x9a0 fs/read_write.c:580
#1: ffff8880471b8688 (&buffer->mutex){+.+.}-{3:3}, at: configfs_write_iter+0x7d/0x400 fs/configfs/file.c:226
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
#2: ffff88802e4e6778 (&p->frag_sem){.+.+}-{3:3}, at: configfs_write_iter+0x20e/0x400 fs/configfs/file.c:229
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: class_mutex_constructor include/linux/mutex.h:250 [inline]
#3: ffffffff8d400068 (lock#6){+.+.}-{3:3}, at: nullb_device_irqmode_store+0x10a/0x1f0 drivers/block/null_blk/main.c:432
1 lock held by syz-executor/5075:
#0: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd56d68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x80d/0xfb0 net/core/rtnetlink.c:6163
1 lock held by udevd/5078:
#0: ffff8880b8e3acd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x130 kernel/sched/core.c:538
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
<TASK>
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf0e/0xf50 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5079 Comm: modprobe Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:mas_set_range include/linux/maple_tree.h:539 [inline]
RIP: 0010:do_mas_align_munmap+0x8f1/0x12d0 mm/mmap.c:2507
Code: b8 00 00 00 00 00 fc ff df 41 80 7c 05 00 00 74 0d 48 89 df e8 00 60 10 00 48 8b 4c 24 18 48 89 5c 24 78 48 8b 41 08 48 ff c8 <4c> 89 a4 24 38 01 00 00 48 89 84 24 40 01 00 00 48 c7 84 24 48 01
RSP: 0018:ffffc9000525f800 EFLAGS: 00000216
RAX: 00007f5e8af43fff RBX: ffff88807e4016c8 RCX: ffff88807e4016c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f5e8af43fff
RBP: ffffc9000525fa50 R08: ffff88802caf5a00 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: 00007f5e8af42000
R13: 1ffff1100fc802d9 R14: 1ffff1100fc802d8 R15: ffff88807e4011b0
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e8af45000 CR3: 0000000030646000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650
__mmap_region mm/mmap.c:2698 [inline]
mmap_region+0x7ab/0x1c50 mm/mmap.c:2916
do_mmap+0x9ce/0x10d0 mm/mmap.c:1436
vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:520
ksys_mmap_pgoff+0x4bf/0x720 mm/mmap.c:1482
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5e8b266242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007ffe3343bfc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f5e8af42000 RCX: 00007f5e8b266242
RDX: 0000000000000003 RSI: 0000000000002000 RDI: 00007f5e8af42000
RBP: 0000000000000812 R08: 0000000000000000 R09: 0000000000006000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007ffe3343c088
R13: 00007f5e8af450c0 R14: 00007ffe3343c400 R15: 00000fffc66877fc
</TASK>