INFO: task syz-executor.1:13989 blocked for more than 143 seconds.
Not tainted 6.0.0-rc2-syzkaller-16455-ga41a877bc12d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack: 0 pid:13989 ppid: 3058 flags:0x00000001
Call trace:
__switch_to+0x180/0x28c arch/arm64/kernel/process.c:557
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x414/0x570 kernel/sched/core.c:6494
schedule+0x64/0xa4 kernel/sched/core.c:6570
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6629
__mutex_lock_common+0x74c/0xc28 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812
blkdev_open+0x84/0xd8 block/fops.c:485
do_dentry_open+0x318/0x688 fs/open.c:878
vfs_open+0x38/0x48 fs/open.c:1014
do_open fs/namei.c:3557 [inline]
path_openat+0xe34/0x11c4 fs/namei.c:3691
do_filp_open+0xdc/0x1b8 fs/namei.c:3718
do_sys_openat2+0xb8/0x22c fs/open.c:1311
do_sys_open fs/open.c:1327 [inline]
__do_sys_openat fs/open.c:1343 [inline]
__se_sys_openat fs/open.c:1338 [inline]
__arm64_sys_openat+0xb0/0xe0 fs/open.c:1338
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x48/0x154 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642
el0t_64_sync+0x18c/0x190
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/10:
#0: ffff80000d4a3568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/11:
#0: ffff80000d4a3bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/26:
#0: ffff80000d4a3440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:279
2 locks held by getty/2713:
#0: ffff0000c7327098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 drivers/tty/tty_ldisc.c:244
#1: ffff80000f67e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x88c drivers/tty/n_tty.c:2177
1 lock held by udevd/3044:
#0: ffff0000c4a2ccc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812
2 locks held by kworker/u4:7/4424:
#0: ffff0001fefcfc58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:544
#1: ffff0001fefbeb88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x208/0x310 kernel/sched/psi.c:880
1 lock held by syz-executor.1/13989:
#0: ffff0000c4a2ccc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812
1 lock held by syz-executor.1/14088:
#0: ffff0000c4a2ccc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812
1 lock held by syz-executor.1/14170:
#0: ffff0000c4a2ccc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc block/bdev.c:812
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