INFO: task syz.2.194:7262 blocked for more than 143 seconds.
Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.194 state:D stack:0 pid:7262 tgid:7256 ppid:6374 flags:0x00000001
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x14ac/0x24d8 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xbc/0x238 kernel/sched/core.c:6837
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6894
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
__do_sys_acct kernel/acct.c:303 [inline]
__se_sys_acct kernel/acct.c:291 [inline]
__arm64_sys_acct+0xcc/0x6a0 kernel/acct.c:291
__invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task syz.3.200:7282 blocked for more than 143 seconds.
Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.200 state:D stack:0 pid:7282 tgid:7282 ppid:6591 flags:0x00000009
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x14ac/0x24d8 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xbc/0x238 kernel/sched/core.c:6837
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6894
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
bdev_release+0x168/0x644 block/bdev.c:1080
blkdev_release+0x20/0x34 block/fops.c:623
__fput+0x1bc/0x774 fs/file_table.c:422
____fput+0x20/0x30 fs/file_table.c:450
task_work_run+0x230/0x2e0 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task syz.3.200:7285 blocked for more than 143 seconds.
Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.200 state:D stack:0 pid:7285 tgid:7282 ppid:6591 flags:0x00000009
Call trace:
__switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0x14ac/0x24d8 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xbc/0x238 kernel/sched/core.c:6837
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6894
__mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:684
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
bdev_release+0x168/0x644 block/bdev.c:1080
blkdev_release+0x20/0x34 block/fops.c:623
__fput+0x1bc/0x774 fs/file_table.c:422
____fput+0x20/0x30 fs/file_table.c:450
task_work_run+0x230/0x2e0 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffff80008f4b7be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:328
1 lock held by udevd/5989:
2 locks held by getty/6137:
#0: ffff0000d29a50a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff8000980ee2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211
1 lock held by udevd/6661:
#0: ffff0000ca70c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xd0/0xbb8 block/bdev.c:897
1 lock held by syz.0.44/6664:
4 locks held by syz.0.44/6665:
1 lock held by syz.2.194/7262:
#0: ffff80008f4dfbe8 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:303 [inline]
#0: ffff80008f4dfbe8 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:291 [inline]
#0: ffff80008f4dfbe8 (acct_on_mutex){+.+.}-{3:3}, at: __arm64_sys_acct+0xcc/0x6a0 kernel/acct.c:291
1 lock held by syz.3.200/7282:
#0: ffff0000ca70c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x168/0x644 block/bdev.c:1080
1 lock held by syz.3.200/7285:
#0: ffff0000ca70c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x168/0x644 block/bdev.c:1080
3 locks held by syz.2.574/9657:
1 lock held by syz.1.575/9660:
#0: ffff0000d6a4e988 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff0000d6a4e988 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x154/0x38c mm/util.c:571
4 locks held by syz.1.575/9661:
2 locks held by syz.4.564/9663:
#0: ffff0001153260e0 (&type->s_umount_key#52/1){+.+.}-{3:3}, at: alloc_super+0x1b0/0x83c fs/super.c:344
#1: ffff80008f4bcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffff80008f4bcf38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x354/0x678 kernel/rcu/tree_exp.h:939
=============================================