INFO: task syz.1.164:7328 blocked for more than 143 seconds. Not tainted 6.12.0-rc1-syzkaller-g80cb3fb61135 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.164 state:D stack:0 pid:7328 tgid:7319 ppid:6717 flags:0x00000001 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:697 context_switch kernel/sched/core.c:5315 [inline] __schedule+0x14bc/0x2718 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6767 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6824 __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 fdget_pos+0x214/0x2a0 fs/file.c:1187 ksys_read+0x8c/0x26c fs/read_write.c:703 __do_sys_read fs/read_write.c:722 [inline] __se_sys_read fs/read_write.c:720 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:720 __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:732 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:750 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 INFO: task syz.1.164:7339 blocked for more than 144 seconds. Not tainted 6.12.0-rc1-syzkaller-g80cb3fb61135 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.164 state:D stack:0 pid:7339 tgid:7319 ppid:6717 flags:0x00000001 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:697 context_switch kernel/sched/core.c:5315 [inline] __schedule+0x14bc/0x2718 kernel/sched/core.c:6675 __schedule_loop kernel/sched/core.c:6752 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6767 d_wait_lookup+0x1a0/0x27c fs/dcache.c:2465 d_alloc_parallel+0x9c4/0x1184 fs/dcache.c:2547 __lookup_slow+0x108/0x374 fs/namei.c:1717 lookup_slow+0x60/0x84 fs/namei.c:1749 walk_component fs/namei.c:2053 [inline] link_path_walk+0x774/0xc44 fs/namei.c:2418 path_openat+0x1d0/0x2b14 fs/namei.c:3929 do_filp_open+0x1bc/0x3cc fs/namei.c:3960 do_sys_openat2+0x124/0x1b8 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1441 __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:732 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:750 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: ffff80008f9cf760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 2 locks held by kworker/u8:4/59: 2 locks held by getty/6171: #0: ffff0000d35e60a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b7fb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 2 locks held by syz.1.164/7320: 2 locks held by syz.1.164/7326: 1 lock held by syz.1.164/7328: #0: ffff0000d6365978 (&f->f_pos_lock){+.+.}-{3:3}, at: fdget_pos+0x214/0x2a0 fs/file.c:1187 1 lock held by syz.1.164/7331: 1 lock held by syz.1.164/7333: 1 lock held by syz.1.164/7339: #0: ffff0000f6024180 (&type->i_mutex_dir_key#14){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:825 [inline] #0: ffff0000f6024180 (&type->i_mutex_dir_key#14){.+.+}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1748 2 locks held by syz.0.612/9252: 1 lock held by syz.2.627/9294: #0: ffff0000e5b04988 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline] #0: ffff0000e5b04988 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x154/0x38c mm/util.c:586 1 lock held by syz.2.627/9295: #0: ffff0001b3675918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:593 [inline] #0: ffff0001b3675918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1505 [inline] #0: ffff0001b3675918 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1804 [inline] #0: ffff0001b3675918 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2ec/0x2718 kernel/sched/core.c:6575 =============================================