REISERFS (device loop3): Using r5 hash to sort names
REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.417/6967 is trying to acquire lock:
ffff888054a22410 (&type->i_mutex_dir_key#13){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
ffff888054a22410 (&type->i_mutex_dir_key#13){++++}-{3:3}, at: vfs_rename+0x6d3/0xec0 fs/namei.c:4845
but task is already holding lock:
ffff888054a21d70 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
ffff888054a21d70 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}, at: vfs_rename+0x652/0xec0 fs/namei.c:4843
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}:
down_write_nested+0x9e/0x1f0 kernel/locking/rwsem.c:1689
inode_lock_nested include/linux/fs.h:839 [inline]
xattr_rmdir fs/reiserfs/xattr.c:107 [inline]
delete_one_xattr+0xfa/0x300 fs/reiserfs/xattr.c:339
reiserfs_for_each_xattr+0x800/0x960 fs/reiserfs/xattr.c:312
reiserfs_delete_xattrs+0x20/0x90 fs/reiserfs/xattr.c:365
reiserfs_evict_inode+0x232/0x490 fs/reiserfs/inode.c:53
evict+0x486/0x870 fs/inode.c:705
d_delete_notify include/linux/fsnotify.h:269 [inline]
vfs_rmdir+0x39b/0x4d0 fs/namei.c:4217
do_rmdir+0x29e/0x5c0 fs/namei.c:4263
__do_sys_unlinkat fs/namei.c:4441 [inline]
__se_sys_unlinkat fs/namei.c:4435 [inline]
__x64_sys_unlinkat+0xc4/0xe0 fs/namei.c:4435
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #1 (&type->i_mutex_dir_key#13/3){+.+.}-{3:3}:
down_write_nested+0x9e/0x1f0 kernel/locking/rwsem.c:1689
inode_lock_nested include/linux/fs.h:839 [inline]
open_xa_root fs/reiserfs/xattr.c:128 [inline]
open_xa_dir+0x122/0x6f0 fs/reiserfs/xattr.c:153
xattr_lookup+0x22/0x2a0 fs/reiserfs/xattr.c:396
reiserfs_xattr_set_handle+0xf9/0xd40 fs/reiserfs/xattr.c:535
reiserfs_xattr_set+0x439/0x550 fs/reiserfs/xattr.c:635
__vfs_setxattr+0x431/0x470 fs/xattr.c:201
__vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235
vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322
do_setxattr fs/xattr.c:630 [inline]
path_setxattr+0x362/0x550 fs/xattr.c:659
__do_sys_setxattr fs/xattr.c:677 [inline]
__se_sys_setxattr fs/xattr.c:673 [inline]
__x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:673
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #0 (&type->i_mutex_dir_key#13){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:804 [inline]
vfs_rename+0x6d3/0xec0 fs/namei.c:4845
do_renameat2+0x8a1/0xc70 fs/namei.c:5033
__do_sys_renameat2 fs/namei.c:5066 [inline]
__se_sys_renameat2 fs/namei.c:5063 [inline]
__x64_sys_renameat2+0xd2/0xe0 fs/namei.c:5063
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
other info that might help us debug this:
Chain exists of:
&type->i_mutex_dir_key#13
--> &type->i_mutex_dir_key#13/3 --> &type->i_mutex_dir_key#13
/2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&type->i_mutex_dir_key#13/2);
lock(&type->i_mutex_dir_key#13/3);
lock(&type->i_mutex_dir_key#13
/2);
lock(&type->i_mutex_dir_key#13);
*** DEADLOCK ***
5 locks held by syz.3.417/6967:
#0: ffff88807a9e4418 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
#1: ffff88807a9e4700 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: lock_rename fs/namei.c:3050 [inline]
#1: ffff88807a9e4700 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: do_renameat2+0x35f/0xc70 fs/namei.c:4972
#2: ffff8880549b6cf0 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
#2: ffff8880549b6cf0 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: lock_two_directories fs/namei.c:-1 [inline]
#2: ffff8880549b6cf0 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3051 [inline]
#2: ffff8880549b6cf0 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: do_renameat2+0x3f1/0xc70 fs/namei.c:4972
#3: ffff888054a216d0 (&type->i_mutex_dir_key#13/5){+.+.}-{3:3}, at: lock_rename include/linux/fs.h:-1 [inline]
#3: ffff888054a216d0 (&type->i_mutex_dir_key#13/5){+.+.}-{3:3}, at: do_renameat2+0x427/0xc70 fs/namei.c:4972
#4: ffff888054a21d70 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
#4: ffff888054a21d70 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}, at: vfs_rename+0x652/0xec0 fs/namei.c:4843
stack backtrace:
CPU: 1 PID: 6967 Comm: syz.3.417 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
<TASK>
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187
check_prev_add kernel/locking/lockdep.c:3134 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:804 [inline]
vfs_rename+0x6d3/0xec0 fs/namei.c:4845
do_renameat2+0x8a1/0xc70 fs/namei.c:5033
__do_sys_renameat2 fs/namei.c:5066 [inline]
__se_sys_renameat2 fs/namei.c:5063 [inline]
__x64_sys_renameat2+0xd2/0xe0 fs/namei.c:5063
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f054118f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0542037038 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f05413e5fa0 RCX: 00007f054118f6c9
RDX: ffffffffffffff9c RSI: 0000200000001100 RDI: ffffffffffffff9c
RBP: 00007f0541211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000600 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f05413e6038 R14: 00007f05413e5fa0 R15: 00007fff06d9fc08
</TASK>