INFO: task syz.2.63:6655 blocked for more than 143 seconds. Not tainted 6.11.0-rc5-syzkaller-gdf54f4a16f82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.63 state:D stack:0 pid:6655 tgid:6654 ppid:6411 flags:0x00000001 Call trace: __switch_to+0x418/0x658 arch/arm64/kernel/process.c:579 context_switch kernel/sched/core.c:5188 [inline] __schedule+0x13d4/0x2418 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6621 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6678 __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_open+0xd0/0xbd4 block/bdev.c:897 blkdev_open+0x324/0x484 block/fops.c:630 do_dentry_open+0x78c/0x10a4 fs/open.c:959 vfs_open+0x48/0x2d4 fs/open.c:1089 do_open fs/namei.c:3727 [inline] path_openat+0x2208/0x29f8 fs/namei.c:3886 do_filp_open+0x1bc/0x3cc fs/namei.c:3913 do_sys_openat2+0x124/0x1b8 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1442 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 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.2.63:6658 blocked for more than 143 seconds. Not tainted 6.11.0-rc5-syzkaller-gdf54f4a16f82 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.63 state:D stack:0 pid:6658 tgid:6654 ppid:6411 flags:0x0000000d Call trace: __switch_to+0x418/0x658 arch/arm64/kernel/process.c:579 context_switch kernel/sched/core.c:5188 [inline] __schedule+0x13d4/0x2418 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6621 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6678 __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:638 __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:228 get_signal+0x1354/0x1530 kernel/signal.c:2689 do_signal+0x254/0x4014 arch/arm64/kernel/signal.c:1308 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 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: ffff80008f6edba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:325 3 locks held by kworker/u8:8/1949: 2 locks held by getty/6169: #0: ffff0000d77600a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009836e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 1 lock held by udevd/6394: #0: ffff0000ca7da4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xd0/0xbd4 block/bdev.c:897 1 lock held by syz.2.63/6655: #0: ffff0000ca7da4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0xd0/0xbd4 block/bdev.c:897 1 lock held by syz.2.63/6658: #0: ffff0000ca7da4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x168/0x644 block/bdev.c:1080 1 lock held by syz.0.850/10684: 2 locks held by syz.3.865/10732: 1 lock held by syz.1.864/10745: =============================================