INFO: task syz.2.25:6624 blocked for more than 143 seconds. Not tainted 6.12.0-rc4-syzkaller-gdf1aa7b14127 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.25 state:D stack:0 pid:6624 tgid:6605 ppid:6425 flags:0x00000001 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6839 rwsem_down_write_slowpath+0xd10/0x14c8 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write_nested+0xc0/0xcc kernel/locking/rwsem.c:1694 inode_lock_nested include/linux/fs.h:850 [inline] filename_create+0x204/0x468 fs/namei.c:4026 do_mkdirat+0xac/0x574 fs/namei.c:4272 __do_sys_mkdirat fs/namei.c:4295 [inline] __se_sys_mkdirat fs/namei.c:4293 [inline] __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4293 __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:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz.2.25:6626 blocked for more than 143 seconds. Not tainted 6.12.0-rc4-syzkaller-gdf1aa7b14127 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.25 state:D stack:0 pid:6626 tgid:6605 ppid:6425 flags:0x00000001 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6839 rwsem_down_read_slowpath+0x534/0x858 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0xa0/0x2fc kernel/locking/rwsem.c:1526 inode_lock_shared include/linux/fs.h:825 [inline] lookup_slow+0x50/0x84 fs/namei.c:1748 walk_component+0x280/0x36c fs/namei.c:2053 lookup_last fs/namei.c:2556 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2580 filename_lookup+0x1d4/0x4e0 fs/namei.c:2609 user_path_at+0x50/0x74 fs/namei.c:3016 do_mount fs/namespace.c:3844 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount fs/namespace.c:4032 [inline] __arm64_sys_mount+0x424/0x5a8 fs/namespace.c:4032 __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:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz.2.25:6627 blocked for more than 143 seconds. Not tainted 6.12.0-rc4-syzkaller-gdf1aa7b14127 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.25 state:D stack:0 pid:6627 tgid:6605 ppid:6425 flags:0x00000001 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6839 rwsem_down_read_slowpath+0x534/0x858 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0xa0/0x2fc kernel/locking/rwsem.c:1526 inode_lock_shared include/linux/fs.h:825 [inline] lookup_slow+0x50/0x84 fs/namei.c:1748 walk_component fs/namei.c:2053 [inline] link_path_walk+0x774/0xc44 fs/namei.c:2418 path_lookupat+0x90/0x3d0 fs/namei.c:2579 filename_lookup+0x1d4/0x4e0 fs/namei.c:2609 user_path_at+0x50/0x74 fs/namei.c:3016 path_setxattr+0x1d4/0x428 fs/xattr.c:653 __do_sys_lsetxattr fs/xattr.c:683 [inline] __se_sys_lsetxattr fs/xattr.c:679 [inline] __arm64_sys_lsetxattr+0xbc/0xd8 fs/xattr.c:679 __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:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 INFO: task syz.2.25:6630 blocked for more than 143 seconds. Not tainted 6.12.0-rc4-syzkaller-gdf1aa7b14127 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.25 state:D stack:0 pid:6630 tgid:6605 ppid:6425 flags:0x00000001 Call trace: __switch_to+0x428/0x860 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5328 [inline] __schedule+0x16f8/0x2804 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xbc/0x238 kernel/sched/core.c:6782 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6839 rwsem_down_read_slowpath+0x534/0x858 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0xa0/0x2fc kernel/locking/rwsem.c:1526 inode_lock_shared include/linux/fs.h:825 [inline] lookup_slow+0x50/0x84 fs/namei.c:1748 walk_component+0x280/0x36c fs/namei.c:2053 lookup_last fs/namei.c:2556 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2580 filename_lookup+0x1d4/0x4e0 fs/namei.c:2609 user_path_at+0x50/0x74 fs/namei.c:3016 path_getxattr+0xe4/0x380 fs/xattr.c:785 __do_sys_lgetxattr fs/xattr.c:806 [inline] __se_sys_lgetxattr fs/xattr.c:803 [inline] __arm64_sys_lgetxattr+0xa0/0xb8 fs/xattr.c:803 __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:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffff80008f9e0760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:336 2 locks held by getty/6177: #0: ffff0000d76b80a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b83b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2211 2 locks held by syz.2.25/6606: 2 locks held by syz.2.25/6624: #0: ffff0000d8f30420 (sb_writers #14 ){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:515 #1: ffff0000ef13c180 (&type->i_mutex_dir_key#9/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline] #1: ffff0000ef13c180 (&type->i_mutex_dir_key#9/1){+.+.}-{3:3}, at: filename_create+0x204/0x468 fs/namei.c:4026 1 lock held by syz.2.25/6626: #0: ffff0000ef13c180 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:825 [inline] #0: ffff0000ef13c180 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1748 1 lock held by syz.2.25/6627: #0: ffff0000ef13c180 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:825 [inline] #0: ffff0000ef13c180 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1748 1 lock held by syz.2.25/6630: #0: ffff0000ef13c180 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:825 [inline] #0: ffff0000ef13c180 (&type->i_mutex_dir_key#9){.+.+}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1748 2 locks held by syz-executor/8147: #0: ffff8000900c2c28 (bio_slab_lock){+.+.}-{3:3}, at: bio_put_slab block/bio.c:140 [inline] #0: ffff8000900c2c28 (bio_slab_lock){+.+.}-{3:3}, at: bioset_exit+0x240/0x434 block/bio.c:1812 #1: ffff80008f9e5b80 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x58/0x534 kernel/rcu/tree.c:4562 2 locks held by syz.0.417/8738: 1 lock held by syz.3.420/8735: #0: ffff80008f9e5cb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #0: ffff80008f9e5cb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x354/0x674 kernel/rcu/tree_exp.h:976 2 locks held by udevadm/8752: =============================================