INFO: task syz.8.25:5475 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.25 state:D stack:0 pid:5475 ppid:5452 flags:0x00000001
Call trace:
__switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0xdd0/0x1b0c kernel/sched/core.c:6562
schedule+0xc4/0x170 kernel/sched/core.c:6638
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6697
__mutex_lock_common+0xafc/0x1f60 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
__do_sys_acct kernel/acct.c:327 [inline]
__se_sys_acct kernel/acct.c:315 [inline]
__arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffff800015417df0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffff800015418610 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffff800015417480 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
2 locks held by getty/4081:
#0: ffff0000d64ca098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80001df862f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198
2 locks held by syz.7.24/5312:
1 lock held by syz.8.25/5475:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
1 lock held by syz.9.26/5635:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
1 lock held by syz.0.27/5890:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
1 lock held by syz.1.28/6350:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
1 lock held by syz.2.29/6847:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
1 lock held by syz.3.30/7254:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
1 lock held by syz.4.31/7802:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
1 lock held by syz.5.32/8271:
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:327 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:315 [inline]
#0: ffff80001543ba08 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x714 kernel/acct.c:315
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