INFO: task syz.3.19:4960 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.19 state:D stack: 0 pid: 4960 ppid: 4816 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe08/0x1bf8 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 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:3537 [inline] path_openat+0x5f4/0x26e4 fs/namei.c:3747 do_filp_open+0x164/0x330 fs/namei.c:3777 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 INFO: task syz.2.18:4988 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.18 state:D stack: 0 pid: 4988 ppid: 4815 flags:0x00000001 Call trace: __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521 context_switch kernel/sched/core.c:5049 [inline] __schedule+0xe08/0x1bf8 kernel/sched/core.c:6395 schedule+0x11c/0x1c8 kernel/sched/core.c:6478 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:3537 [inline] path_openat+0x5f4/0x26e4 fs/namei.c:3747 do_filp_open+0x164/0x330 fs/namei.c:3777 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: 2 locks held by kworker/u4:0/9: 1 lock held by khungtaskd/27: #0: ffff800014361520 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312 4 locks held by kworker/u4:3/348: 2 locks held by udevd/3661: 2 locks held by getty/3804: #0: ffff0000d46d0098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001bd6e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158 2 locks held by syz.3.19/4953: 2 locks held by syz.3.19/4960: #0: ffff0000c168c460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f09c8188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f09c8188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f09c8188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 3 locks held by syz.2.18/4982: 2 locks held by syz.2.18/4988: #0: ffff0000cef20460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f0b90188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f0b90188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f0b90188 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 3 locks held by syz.0.16/5354: 2 locks held by syz.0.16/5357: #0: ffff0000db88e460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f09c86d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f09c86d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f09c86d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 3 locks held by syz.1.17/5363: 2 locks held by syz.1.17/5369: #0: ffff0000c967c460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f0b906d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f0b906d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f0b906d0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 2 locks held by syz.4.20/5367: 2 locks held by syz.4.20/5372: #0: ffff0000f0398460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f0b90c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f0b90c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f0b90c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 2 locks held by syz.5.21/5640: 2 locks held by syz.5.21/5643: #0: ffff0000f06b4460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f0b91160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f0b91160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f0b91160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 3 locks held by syz.6.22/5653: 2 locks held by syz.6.22/5654: #0: ffff0000ede1a460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f09c8c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f09c8c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f09c8c18 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 2 locks held by syz.7.23/5742: 2 locks held by syz.7.23/5743: #0: ffff0000e7afe460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f09c9160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f09c9160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f09c9160 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 2 locks held by syz.8.24/5745: 2 locks held by syz.8.24/5746: #0: ffff0000f1bfa460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f09c96a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f09c96a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f09c96a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 2 locks held by syz.9.25/5748: 2 locks held by syz.9.25/5749: #0: ffff0000ce300460 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:386 #1: ffff0000f0b916a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff0000f0b916a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3537 [inline] #1: ffff0000f0b916a8 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x5f4/0x26e4 fs/namei.c:3747 2 locks held by syz-executor/11777: #0: ffff8000162bf428 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffff8000162bf428 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6ec/0xce4 net/core/rtnetlink.c:5681 #1: ffff800014365fe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffff800014365fe8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2f0/0x5e0 kernel/rcu/tree_exp.h:845 2 locks held by syz-executor/11870: =============================================