INFO: task syz-executor.4:5895 blocked for more than 143 seconds. Not tainted 5.15.153-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack: 0 pid: 5895 ppid: 5437 flags:0x00000005 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5030 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6376 schedule+0x11c/0x1c8 kernel/sched/core.c:6459 rwsem_down_write_slowpath+0xca8/0x1340 kernel/locking/rwsem.c:1157 __down_write_common kernel/locking/rwsem.c:1284 [inline] __down_write kernel/locking/rwsem.c:1293 [inline] down_write+0x25c/0x260 kernel/locking/rwsem.c:1542 user_get_super+0xd8/0x240 fs/super.c:835 quotactl_block fs/quota/quota.c:889 [inline] __do_sys_quotactl fs/quota/quota.c:953 [inline] __se_sys_quotactl fs/quota/quota.c:915 [inline] __arm64_sys_quotactl+0x4b0/0x7a4 fs/quota/quota.c:915 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 INFO: task syz-executor.4:5897 blocked for more than 143 seconds. Not tainted 5.15.153-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack: 0 pid: 5897 ppid: 5437 flags:0x00000005 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5030 [inline] __schedule+0xf10/0x1e48 kernel/sched/core.c:6376 schedule+0x11c/0x1c8 kernel/sched/core.c:6459 rwsem_down_write_slowpath+0xca8/0x1340 kernel/locking/rwsem.c:1157 __down_write_common kernel/locking/rwsem.c:1284 [inline] __down_write kernel/locking/rwsem.c:1293 [inline] down_write+0x25c/0x260 kernel/locking/rwsem.c:1542 user_get_super+0xd8/0x240 fs/super.c:835 quotactl_block fs/quota/quota.c:889 [inline] __do_sys_quotactl fs/quota/quota.c:953 [inline] __se_sys_quotactl fs/quota/quota.c:915 [inline] __arm64_sys_quotactl+0x4b0/0x7a4 fs/quota/quota.c:915 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800014ae14a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 2 locks held by kworker/u4:3/296: 2 locks held by getty/3719: #0: ffff0000d2ff2098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff800018e462e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158 5 locks held by syz-executor.0/5122: 4 locks held by syz-executor.4/5249: 1 lock held by syz-executor.4/5895: #0: ffff0000c19820e0 (&type->s_umount_key#73){+.+.}-{3:3}, at: user_get_super+0xd8/0x240 fs/super.c:835 1 lock held by syz-executor.4/5897: #0: ffff0000c19820e0 (&type->s_umount_key#73){+.+.}-{3:3}, at: user_get_super+0xd8/0x240 fs/super.c:835 1 lock held by syz-executor.0/6167: #0: ffff0000d184c0e0 (&type->s_umount_key#73){+.+.}-{3:3}, at: user_get_super+0xd8/0x240 fs/super.c:835 1 lock held by syz-executor.4/6289: #0: ffff0000c19820e0 (&type->s_umount_key#73){+.+.}-{3:3}, at: user_get_super+0xd8/0x240 fs/super.c:835 1 lock held by syz-executor.0/7878: #0: ffff0000d184c0e0 (&type->s_umount_key#73){+.+.}-{3:3}, at: user_get_super+0xd8/0x240 fs/super.c:835 =============================================