INFO: task udevd:4428 blocked for more than 143 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:24736 pid:4428 ppid:1 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_dop_revalidate+0xf0/0x5b0 fs/kernfs/dir.c:1130
d_revalidate fs/namei.c:856 [inline]
d_revalidate fs/namei.c:853 [inline]
lookup_fast+0x22d/0x520 fs/namei.c:1646
walk_component+0x5e/0x5a0 fs/namei.c:1989
link_path_walk.part.0+0x730/0xdf0 fs/namei.c:2320
link_path_walk fs/namei.c:2244 [inline]
path_lookupat+0xb7/0x840 fs/namei.c:2473
filename_lookup+0x1d2/0x590 fs/namei.c:2503
vfs_statx+0x14c/0x430 fs/stat.c:232
vfs_fstatat+0x90/0xb0 fs/stat.c:270
__do_sys_newfstatat+0x94/0x120 fs/stat.c:440
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f20ead251da
RSP: 002b:00007ffc838a5138 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000561f40bcecc0 RCX: 00007f20ead251da
RDX: 00007ffc838a5148 RSI: 00007ffc838a55d8 RDI: 00000000ffffff9c
RBP: 00007ffc838a51d8 R08: 0000000000000000 R09: 0000561f40bd1160
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc838a55d8
R13: 00007ffc838a5148 R14: 0000561f40ba9910 R15: 0000000000000000
INFO: task syz-executor.1:5091 blocked for more than 143 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:23600 pid:5091 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_find_and_get_ns+0x73/0xc0 fs/kernfs/dir.c:891
kernfs_find_and_get include/linux/kernfs.h:597 [inline]
sysfs_unmerge_group+0x61/0x170 fs/sysfs/group.c:365
dpm_sysfs_remove+0x8c/0xb0 drivers/base/power/sysfs.c:836
device_del+0x20f/0xc80 drivers/base/core.c:3643
device_unregister+0x1e/0xc0 drivers/base/core.c:3698
bdi_unregister+0x42d/0x600 mm/backing-dev.c:1072
generic_shutdown_super+0x33d/0x410 fs/super.c:507
kill_anon_super+0x3a/0x60 fs/super.c:1086
btrfs_kill_super+0x3c/0x50 fs/btrfs/super.c:2132
deactivate_locked_super+0x98/0x160 fs/super.c:332
deactivate_super+0xb1/0xd0 fs/super.c:363
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0b6688d537
RSP: 002b:00007fff1a93dbc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f0b6688d537
RDX: 00007fff1a93dc9b RSI: 000000000000000a RDI: 00007fff1a93dc90
RBP: 00007fff1a93dc90 R08: 00000000ffffffff R09: 00007fff1a93da60
R10: 00005555570298b3 R11: 0000000000000246 R12: 00007f0b668e6b24
R13: 00007fff1a93ed50 R14: 0000555557029810 R15: 00007fff1a93ed90
INFO: task syz-executor.0:5093 blocked for more than 144 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23184 pid:5093 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_find_and_get_ns+0x73/0xc0 fs/kernfs/dir.c:891
kernfs_find_and_get include/linux/kernfs.h:597 [inline]
sysfs_unmerge_group+0x61/0x170 fs/sysfs/group.c:365
dpm_sysfs_remove+0x66/0xb0 drivers/base/power/sysfs.c:833
device_del+0x20f/0xc80 drivers/base/core.c:3643
device_unregister+0x1e/0xc0 drivers/base/core.c:3698
bdi_unregister+0x42d/0x600 mm/backing-dev.c:1072
generic_shutdown_super+0x33d/0x410 fs/super.c:507
kill_anon_super+0x3a/0x60 fs/super.c:1086
fuse_kill_sb_anon+0x1e3/0x330 fs/fuse/inode.c:1813
deactivate_locked_super+0x98/0x160 fs/super.c:332
deactivate_super+0xb1/0xd0 fs/super.c:363
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f13ed08d537
RSP: 002b:00007ffc492f9bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f13ed08d537
RDX: 00007ffc492f9c9b RSI: 000000000000000a RDI: 00007ffc492f9c90
RBP: 00007ffc492f9c90 R08: 00000000ffffffff R09: 00007ffc492f9a60
R10: 0000555556a3c8b3 R11: 0000000000000246 R12: 00007f13ed0e6b24
R13: 00007ffc492fad50 R14: 0000555556a3c810 R15: 00007ffc492fad90
INFO: task syz-executor.2:5099 blocked for more than 144 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24024 pid:5099 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x3d6/0x670 fs/namei.c:525
inode_permission fs/namei.c:506 [inline]
may_lookup fs/namei.c:1715 [inline]
link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262
link_path_walk fs/namei.c:2245 [inline]
path_openat+0x25c/0x2a50 fs/namei.c:3710
do_filp_open+0x1ba/0x410 fs/namei.c:3741
do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fec5948bc38
RSP: 002b:00007ffdf7e4f910 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000009a3 RCX: 00007fec5948bc38
RDX: 0000000000090800 RSI: 00007fec594e6bc8 RDI: 00000000ffffff9c
RBP: 00007ffdf7e4f9dc R08: 0000000000090800 R09: 00007fec594e6bc8
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000013239e R14: 0000000000000009 R15: 00007ffdf7e4fa40
INFO: task syz-executor.3:5103 blocked for more than 145 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:23904 pid:5103 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_find_and_get_ns+0x73/0xc0 fs/kernfs/dir.c:891
kernfs_find_and_get include/linux/kernfs.h:597 [inline]
sysfs_unmerge_group+0x61/0x170 fs/sysfs/group.c:365
dpm_sysfs_remove+0x66/0xb0 drivers/base/power/sysfs.c:833
device_del+0x20f/0xc80 drivers/base/core.c:3643
device_unregister+0x1e/0xc0 drivers/base/core.c:3698
bdi_unregister+0x42d/0x600 mm/backing-dev.c:1072
generic_shutdown_super+0x33d/0x410 fs/super.c:507
kill_anon_super+0x3a/0x60 fs/super.c:1086
fuse_kill_sb_anon+0x1e3/0x330 fs/fuse/inode.c:1813
deactivate_locked_super+0x98/0x160 fs/super.c:332
deactivate_super+0xb1/0xd0 fs/super.c:363
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1291
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f383f88d537
RSP: 002b:00007ffc374be4e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f383f88d537
RDX: 00007ffc374be5bb RSI: 000000000000000a RDI: 00007ffc374be5b0
RBP: 00007ffc374be5b0 R08: 00000000ffffffff R09: 00007ffc374be380
R10: 00005555566198b3 R11: 0000000000000246 R12: 00007f383f8e6b24
R13: 00007ffc374bf670 R14: 0000555556619810 R15: 00007ffc374bf6b0
INFO: task syz-executor.4:5104 blocked for more than 145 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:24424 pid:5104 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x3d6/0x670 fs/namei.c:525
inode_permission fs/namei.c:506 [inline]
may_lookup fs/namei.c:1715 [inline]
link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262
link_path_walk fs/namei.c:2245 [inline]
path_openat+0x25c/0x2a50 fs/namei.c:3710
do_filp_open+0x1ba/0x410 fs/namei.c:3741
do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa83e08bc38
RSP: 002b:00007ffc648284f0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000a53 RCX: 00007fa83e08bc38
RDX: 0000000000090800 RSI: 00007fa83e0e6bc8 RDI: 00000000ffffff9c
RBP: 00007ffc648285bc R08: 0000000000090800 R09: 00007fa83e0e6bc8
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 00000000001322b0 R14: 0000000000000009 R15: 00007ffc64828620
INFO: task syz-executor.5:5105 blocked for more than 146 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:24080 pid:5105 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288
do_inode_permission fs/namei.c:458 [inline]
inode_permission.part.0+0x3d6/0x670 fs/namei.c:525
inode_permission fs/namei.c:506 [inline]
may_lookup fs/namei.c:1715 [inline]
link_path_walk.part.0+0x81e/0xdf0 fs/namei.c:2262
link_path_walk fs/namei.c:2245 [inline]
path_openat+0x25c/0x2a50 fs/namei.c:3710
do_filp_open+0x1ba/0x410 fs/namei.c:3741
do_sys_openat2+0x16d/0x4c0 fs/open.c:1310
do_sys_open fs/open.c:1326 [inline]
__do_sys_openat fs/open.c:1342 [inline]
__se_sys_openat fs/open.c:1337 [inline]
__x64_sys_openat+0x143/0x1f0 fs/open.c:1337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fce6968bc38
RSP: 002b:00007fff6fd249b0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000974 RCX: 00007fce6968bc38
RDX: 0000000000090800 RSI: 00007fce696e6bc8 RDI: 00000000ffffff9c
RBP: 00007fff6fd24a7c R08: 0000000000090800 R09: 00007fce696e6bc8
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 00000000001325d9 R14: 000000000000001c R15: 00007fff6fd24ae0
INFO: task udevadm:22843 blocked for more than 146 seconds.
Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevadm state:D stack:26696 pid:22843 ppid:22429 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
kernfs_dop_revalidate+0xf0/0x5b0 fs/kernfs/dir.c:1130
d_revalidate fs/namei.c:856 [inline]
d_revalidate fs/namei.c:853 [inline]
lookup_fast+0x22d/0x520 fs/namei.c:1646
walk_component+0x5e/0x5a0 fs/namei.c:1989
link_path_walk.part.0+0x730/0xdf0 fs/namei.c:2320
link_path_walk fs/namei.c:2244 [inline]
path_lookupat+0xb7/0x840 fs/namei.c:2473
filename_lookup+0x1d2/0x590 fs/namei.c:2503
user_path_at_empty+0x46/0x60 fs/namei.c:2876
do_readlinkat+0xcd/0x2f0 fs/stat.c:471
__do_sys_readlink fs/stat.c:504 [inline]
__se_sys_readlink fs/stat.c:501 [inline]
__x64_sys_readlink+0x78/0xb0 fs/stat.c:501
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc7e8327277
RSP: 002b:00007ffda00dcb58 EFLAGS: 00000206 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 000056491c80c770 RCX: 00007fc7e8327277
RDX: 0000000000000400 RSI: 00007ffda00dcf68 RDI: 00007ffda00dcb68
RBP: 00007ffda00dd3a8 R08: 000056491bba1837 R09: 0000000000000000
R10: 000056491c80b3d0 R11: 0000000000000206 R12: 0000000000000200
R13: 00007ffda00dcf68 R14: 00007ffda00dcb68 R15: 000056491c7fada0
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c790fb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c790cb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
1 lock held by udevd/4428:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5b0 fs/kernfs/dir.c:1130
2 locks held by getty/4744:
#0: ffff88802b9f3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.1/5091:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_find_and_get_ns+0x73/0xc0 fs/kernfs/dir.c:891
1 lock held by syz-executor.0/5093:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_find_and_get_ns+0x73/0xc0 fs/kernfs/dir.c:891
1 lock held by syz-executor.2/5099:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288
1 lock held by syz-executor.3/5103:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_find_and_get_ns+0x73/0xc0 fs/kernfs/dir.c:891
1 lock held by syz-executor.4/5104:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288
1 lock held by syz-executor.5/5105:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xbc/0x120 fs/kernfs/inode.c:288
2 locks held by kworker/u4:8/5220:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc90004c6fda8 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
2 locks held by syz-executor.4/22842:
#0: ffff888034c6e0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228
#1: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_add_one+0xa7/0x4f0 fs/kernfs/dir.c:754
1 lock held by udevadm/22843:
#0: ffff888012473948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5b0 fs/kernfs/dir.c:1130
2 locks held by syz-executor.2/22851:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x333/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc75/0xfc0 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 22842 Comm: syz-executor.4 Not tainted 6.2.0-rc5-syzkaller-00221-gab072681eabe #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:match_held_lock+0x1/0xc0 kernel/locking/lockdep.c:5113
Code: b9 ff 48 c7 c7 40 4e 4c 8a e8 3c fe b9 ff e8 ba 78 ff ff 31 c0 48 83 c4 08 5d c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 53 <48> 89 fb 48 83 ec 08 48 39 77 10 74 6a 66 f7 47 22 f0 ff 74 5a 48
RSP: 0018:ffffc90015337538 EFLAGS: 00000093
RAX: 0000000000000005 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888012473908 RDI: ffff8880781627a0
RBP: ffff888012473908 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52002a66ea3 R11: 0000000000000000 R12: ffff888078161d40
R13: ffff888078162778 R14: 00000000ffffffff R15: ffff8880781627a0
FS: 00007fa83eeab700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fec4fc3e000 CR3: 000000001d460000 CR4: 0000000000350ee0
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5409 [inline]
lock_is_held_type+0xab/0x140 kernel/locking/lockdep.c:5711
lock_is_held include/linux/lockdep.h:283 [inline]
rwsem_try_write_lock kernel/locking/rwsem.c:613 [inline]
rwsem_down_write_slowpath+0xc69/0x12e0 kernel/locking/rwsem.c:1161
__down_write_common kernel/locking/rwsem.c:1305 [inline]
__down_write_common kernel/locking/rwsem.c:1302 [inline]
__down_write kernel/locking/rwsem.c:1314 [inline]
down_write+0x1e8/0x220 kernel/locking/rwsem.c:1563
kernfs_add_one+0xa7/0x4f0 fs/kernfs/dir.c:754
__kernfs_create_file+0x2a0/0x350 fs/kernfs/file.c:1076
sysfs_add_file_mode_ns+0x213/0x3f0 fs/sysfs/file.c:294
create_files fs/sysfs/group.c:64 [inline]
internal_create_group+0x322/0xb10 fs/sysfs/group.c:148
internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188
internal_create_groups fs/sysfs/group.c:184 [inline]
sysfs_create_groups+0x29/0x50 fs/sysfs/group.c:214
create_dir lib/kobject.c:68 [inline]
kobject_add_internal+0x318/0x8f0 lib/kobject.c:223
kobject_add_varg lib/kobject.c:358 [inline]
kobject_init_and_add+0x105/0x160 lib/kobject.c:441
ext4_register_sysfs+0xb9/0x360 fs/ext4/sysfs.c:526
__ext4_fill_super fs/ext4/super.c:5491 [inline]
ext4_fill_super+0x9ce0/0xb220 fs/ext4/super.c:5644
get_tree_bdev+0x444/0x760 fs/super.c:1282
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa83e08d5fa
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa83eeaaf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000000004a6 RCX: 00007fa83e08d5fa
RDX: 00000000200004c0 RSI: 0000000020000280 RDI: 00007fa83eeaafe0
RBP: 00007fa83eeab020 R08: 00007fa83eeab020 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200004c0
R13: 0000000020000280 R14: 00007fa83eeaafe0 R15: 0000000020000240