======================================================
WARNING: possible circular locking dependency detected
6.1.141-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor309/4343 is trying to acquire lock:
ffff0000e5c6f380 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
ffff0000e5c6f380 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: vfs_rename+0x670/0xdcc fs/namei.c:4839
but task is already holding lock:
ffff0000e5c77380 (&type->i_mutex_dir_key#6/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
ffff0000e5c77380 (&type->i_mutex_dir_key#6/2){+.+.}-{3:3}, at: vfs_rename+0x60c/0xdcc fs/namei.c:4837
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&type->i_mutex_dir_key#6/2){+.+.}-{3:3}:
down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1689
inode_lock_nested include/linux/fs.h:793 [inline]
xattr_rmdir fs/reiserfs/xattr.c:106 [inline]
delete_one_xattr+0xe8/0x2c8 fs/reiserfs/xattr.c:338
reiserfs_for_each_xattr+0x568/0x68c fs/reiserfs/xattr.c:311
reiserfs_delete_xattrs+0x2c/0xa4 fs/reiserfs/xattr.c:364
reiserfs_evict_inode+0x1d8/0x3e8 fs/reiserfs/inode.c:53
evict+0x3c8/0x810 fs/inode.c:705
iput_final fs/inode.c:1834 [inline]
iput+0x764/0x7f4 fs/inode.c:1860
dentry_unlink_inode+0x360/0x438 fs/dcache.c:405
__dentry_kill+0x320/0x598 fs/dcache.c:611
dentry_kill+0xc8/0x248 fs/dcache.c:-1
dput+0x238/0x454 fs/dcache.c:918
cleanup_mnt+0x360/0x404 fs/namespace.c:1181
__cleanup_mnt+0x20/0x30 fs/namespace.c:1189
task_work_run+0x1ec/0x270 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
do_notify_resume+0x1f70/0x2b0c arch/arm64/kernel/signal.c:1137
prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
el0_svc+0x98/0x138 arch/arm64/kernel/entry-common.c:638
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
-> #1 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}:
down_write_nested+0x64/0x94 kernel/locking/rwsem.c:1689
inode_lock_nested include/linux/fs.h:793 [inline]
open_xa_root fs/reiserfs/xattr.c:127 [inline]
open_xa_dir+0x118/0x5d4 fs/reiserfs/xattr.c:152
xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:395
reiserfs_xattr_set_handle+0xd8/0xd94 fs/reiserfs/xattr.c:533
reiserfs_xattr_set+0x388/0x4a8 fs/reiserfs/xattr.c:633
trusted_set+0x98/0xec fs/reiserfs/xattr_trusted.c:31
__vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
__vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216
__vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
vfs_setxattr+0x158/0x2ac fs/xattr.c:309
ovl_do_setxattr fs/overlayfs/overlayfs.h:252 [inline]
ovl_setxattr fs/overlayfs/overlayfs.h:264 [inline]
ovl_make_workdir fs/overlayfs/super.c:1435 [inline]
ovl_get_workdir+0x950/0x1068 fs/overlayfs/super.c:1539
ovl_fill_super+0x139c/0x2294 fs/overlayfs/super.c:2095
mount_nodev+0x68/0x104 fs/super.c:1489
ovl_mount+0x3c/0x50 fs/overlayfs/super.c:2186
legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
vfs_get_tree+0x90/0x274 fs/super.c:1573
do_new_mount+0x228/0x810 fs/namespace.c:3054
path_mount+0x5b4/0xe78 fs/namespace.c:3384
do_mount fs/namespace.c:3397 [inline]
__do_sys_mount fs/namespace.c:3605 [inline]
__se_sys_mount fs/namespace.c:3582 [inline]
__arm64_sys_mount+0x49c/0x584 fs/namespace.c:3582
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
-> #0 (&type->i_mutex_dir_key#6){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049
lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:758 [inline]
vfs_rename+0x670/0xdcc fs/namei.c:4839
do_renameat2+0x738/0xa54 fs/namei.c:5027
__do_sys_renameat2 fs/namei.c:5060 [inline]
__se_sys_renameat2 fs/namei.c:5057 [inline]
__arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
other info that might help us debug this:
Chain exists of:
&type->i_mutex_dir_key#6 --> &type->i_mutex_dir_key#6/3 --> &type->i_mutex_dir_key#6/2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&type->i_mutex_dir_key#6/2);
lock(&type->i_mutex_dir_key#6/3);
lock(&type->i_mutex_dir_key#6/2);
lock(&type->i_mutex_dir_key#6);
*** DEADLOCK ***
5 locks held by syz-executor309/4343:
#0: ffff0000dae82460 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393
#1: ffff0000dae82748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: lock_rename fs/namei.c:3038 [inline]
#1: ffff0000dae82748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: do_renameat2+0x2fc/0xa54 fs/namei.c:4966
#2: ffff0000e5c6e640 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
#2: ffff0000e5c6e640 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline]
#2: ffff0000e5c6e640 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3039 [inline]
#2: ffff0000e5c6e640 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: do_renameat2+0x378/0xa54 fs/namei.c:4966
#3: ffff0000e5c702e0 (&type->i_mutex_dir_key#6/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline]
#3: ffff0000e5c702e0 (&type->i_mutex_dir_key#6/5){+.+.}-{3:3}, at: do_renameat2+0x3ac/0xa54 fs/namei.c:4966
#4: ffff0000e5c77380 (&type->i_mutex_dir_key#6/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline]
#4: ffff0000e5c77380 (&type->i_mutex_dir_key#6/2){+.+.}-{3:3}, at: vfs_rename+0x60c/0xdcc fs/namei.c:4837
stack backtrace:
CPU: 0 PID: 4343 Comm: syz-executor309 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__dump_stack+0x30/0x40 lib/dump_stack.c:88
dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
dump_stack+0x1c/0x5c lib/dump_stack.c:113
print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2048
check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x293c/0x6544 kernel/locking/lockdep.c:5049
lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:758 [inline]
vfs_rename+0x670/0xdcc fs/namei.c:4839
do_renameat2+0x738/0xa54 fs/namei.c:5027
__do_sys_renameat2 fs/namei.c:5060 [inline]
__se_sys_renameat2 fs/namei.c:5057 [inline]
__arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
REISERFS warning (device loop1): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 SD] (nlink == 7) not found (pos 2)