INFO: task syz.3.20:4533 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:26688 pid:4533 ppid:4408 flags:0x00004004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
rwsem_down_write_slowpath+0xbed/0x1090 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blk_ioctl_zeroout block/ioctl.c:191 [inline]
blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
blkdev_ioctl+0x2d8/0x700 block/ioctl.c:620
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd273b8f749
RSP: 002b:00007ffe150e5218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd273de5fa0 RCX: 00007fd273b8f749
RDX: 0000200000000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007fd273c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd273de5fa0 R14: 00007fd273de5fa0 R15: 0000000000000003
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c92bab0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c92c2d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
3 locks held by kworker/0:1H/52:
#0: ffff8880b8e3aad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
#1: ffff8880b8e27848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x398/0x6d0 kernel/sched/psi.c:999
#2: ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#2: ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#2: ffffffff8c92b120 (rcu_read_lock){....}-{1:2}, at: __blk_mq_run_hw_queue+0xb0/0x2f0 block/blk-mq.c:2205
2 locks held by getty/4026:
#0: ffff88802fc2f098 (&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+0x41b/0x1380 drivers/tty/n_tty.c:2198
3 locks held by kworker/0:6/4352:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90003f77d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffff888050a48240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x26b/0x32b0 drivers/net/netdevsim/fib.c:1491
3 locks held by kworker/1:4/4359:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90003e07d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffff88802f7b4240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x26b/0x32b0 drivers/net/netdevsim/fib.c:1491
3 locks held by kworker/1:9/4387:
#0: ffff88814cfcf538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90003277d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x14d0 net/ipv6/addrconf.c:4131
3 locks held by kworker/u4:7/4428:
3 locks held by kworker/0:10/4461:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90003597d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffff88805ab5b240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x26b/0x32b0 drivers/net/netdevsim/fib.c:1491
3 locks held by kworker/0:12/4463:
#0: ffff88814cfcf538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc900035b7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x14d0 net/ipv6/addrconf.c:4131
2 locks held by syz.0.17/4513:
1 lock held by syz.3.20/4533:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.2.19/4534:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.4.21/4535:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.6.23/4623:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.5.22/4625:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.7.24/4669:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.8.25/4670:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.9.26/4671:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.0.27/4708:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.1.28/4717:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.3.29/4767:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.4.31/4773:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.2.30/4774:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.6.32/4822:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.5.33/4827:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.7.34/4864:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.8.35/4904:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.9.36/4907:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.0.37/4941:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.1.38/4954:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.3.39/4965:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.4.40/5011:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.2.41/5018:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.6.42/5068:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.5.43/5069:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.7.44/5100:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
3 locks held by syz-executor/5138:
#0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6147
#1: ffff8880573f13e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x223/0x420 drivers/net/wireguard/device.c:49
#2: ffffffff8c930df8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#2: ffffffff8c930df8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x455/0x830 kernel/rcu/tree_exp.h:962
1 lock held by syz.8.45/5141:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz.9.46/5145:
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
#0: ffff888017960720 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1712/0x1d80 block/ioctl.c:497
1 lock held by syz-executor/5146:
#0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6147
1 lock held by syz-executor/5157:
#0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8db3b3a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6147
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
<TASK>
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 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+0xeee/0xf30 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: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__is_kernel_text kernel/extable.c:95 [inline]
RIP: 0010:is_kernel_text include/linux/kallsyms.h:29 [inline]
RIP: 0010:core_kernel_text kernel/extable.c:68 [inline]
RIP: 0010:kernel_text_address+0x0/0xd0 kernel/extable.c:99
Code: 00 00 00 85 c0 0f 95 c0 48 81 fb 00 d0 45 8f 0f 93 c1 48 81 fb 68 55 5a 8f 0f 92 c2 20 ca 08 c2 0f b6 c2 5b c3 0f 1f 44 00 00 <55> 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff f8 76 40 8a 0f
RSP: 0018:ffffc900001475b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8155c80d RCX: 0000000000000100
RDX: ffffc90000147601 RSI: dffffc0000000000 RDI: ffffffff8155c80d
RBP: ffffc90000147670 R08: ffffc90000147f00 R09: ffffc90000147638
R10: fffff52000028ec9 R11: 1ffff92000028ec7 R12: ffff88813fe73b80
R13: ffffc90000147a00 R14: dffffc0000000000 R15: 1ffff92000028ec6
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36bb1af6c8 CR3: 0000000059748000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__kernel_text_address+0x9/0x30 kernel/extable.c:79
unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323
arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x2d/0x50 mm/kasan/generic.c:516
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1729 [inline]
slab_free_freelist_hook+0x131/0x1a0 mm/slub.c:1755
slab_free mm/slub.c:3687 [inline]
__kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
rcu_do_batch kernel/rcu/tree.c:2297 [inline]
rcu_core+0x9c0/0x16a0 kernel/rcu/tree.c:2557
handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
run_ksoftirqd+0x98/0xf0 kernel/softirq.c:968
smpboot_thread_fn+0x64a/0xa40 kernel/smpboot.c:164
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>