INFO: task syz.3.19:5061 blocked for more than 143 seconds. Not tainted 5.15.181-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.19 state:D stack: 0 pid: 5061 ppid: 4847 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5030 [inline] __schedule+0xe00/0x1c0c kernel/sched/core.c:6376 schedule+0x11c/0x1c8 kernel/sched/core.c:6459 rwsem_down_write_slowpath+0xcb8/0x13f4 kernel/locking/rwsem.c:1165 __down_write_common kernel/locking/rwsem.c:1292 [inline] __down_write kernel/locking/rwsem.c:1301 [inline] down_write+0xe8/0x12c kernel/locking/rwsem.c:1552 inode_lock include/linux/fs.h:787 [inline] open_last_lookups fs/namei.c:3529 [inline] path_openat+0x5f4/0x26e4 fs/namei.c:3739 do_filp_open+0x164/0x330 fs/namei.c:3769 do_sys_openat2+0x128/0x3d8 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __arm64_sys_openat+0x120/0x154 fs/open.c:1280 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/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: ffff8000143211e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311 2 locks held by kworker/u4:4/336: 1 lock held by udevd/3643: 2 locks held by getty/3789: #0: ffff0000d367e098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001b7802e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 2 locks held by syz.3.19/5054: 2 locks held by syz.3.19/5061: #0: ffff0000c2acc460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7a50188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7a50188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7a50188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.2.18/5290: 2 locks held by syz.2.18/5296: #0: ffff0000efdf6460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000f4eb0188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f4eb0188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000f4eb0188 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.4.20/5306: 2 locks held by syz.4.20/5310: #0: ffff0000d98e4460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000f4eb06d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f4eb06d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000f4eb06d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.1.17/5331: 2 locks held by syz.1.17/5334: #0: ffff0000d9062460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7a506d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7a506d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7a506d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.0.16/5338: 2 locks held by syz.0.16/5344: #0: ffff0000d0f04460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7a50c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7a50c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7a50c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.5.21/5516: 2 locks held by syz.5.21/5517: #0: ffff0000c1b8c460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000f4eb0c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f4eb0c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000f4eb0c18 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.6.22/5584: 2 locks held by syz.6.22/5585: #0: ffff0000f2e34460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7a51160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7a51160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7a51160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.7.23/5622: 2 locks held by syz.7.23/5623: #0: ffff0000d6504460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000f4eb1160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f4eb1160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000f4eb1160 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 3 locks held by syz.9.25/5625: 2 locks held by syz.9.25/5628: #0: ffff0000d5af4460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000f4eb16a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f4eb16a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000f4eb16a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 2 locks held by syz.8.24/5627: 2 locks held by syz.8.24/5629: #0: ffff0000d9604460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000e7a516a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000e7a516a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3529 [inline] #1: ffff0000e7a516a8 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3739 =============================================