REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
6.4.0-rc6-syzkaller-00195-g40f71e7cd3c6 #0 Not tainted
------------------------------------------------------
syz-executor348/4995 is trying to acquire lock:
ffff888078af8980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline]
ffff888078af8980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:128 [inline]
ffff888078af8980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610 fs/reiserfs/xattr.c:153
but task is already holding lock:
ffff8880156ec090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 fs/reiserfs/lock.c:78
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&sbi->lock){+.+.}-{3:3}:
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705
__mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27
reiserfs_mkdir+0x321/0x8f0 fs/reiserfs/namei.c:829
xattr_mkdir fs/reiserfs/xattr.c:77 [inline]
open_xa_root fs/reiserfs/xattr.c:137 [inline]
open_xa_dir+0x2cd/0x610 fs/reiserfs/xattr.c:153
xattr_lookup+0x24/0x280 fs/reiserfs/xattr.c:396
reiserfs_xattr_set_handle+0xfc/0xdc0 fs/reiserfs/xattr.c:534
reiserfs_security_write+0x157/0x1d0 fs/reiserfs/xattr_security.c:106
reiserfs_new_inode+0x1631/0x1d40 fs/reiserfs/inode.c:2111
reiserfs_mkdir+0x5b0/0x8f0 fs/reiserfs/namei.c:843
vfs_mkdir+0x29d/0x450 fs/namei.c:4115
do_mkdirat+0x264/0x520 fs/namei.c:4138
__do_sys_mkdir fs/namei.c:4158 [inline]
__se_sys_mkdir fs/namei.c:4156 [inline]
__x64_sys_mkdir+0x6e/0x80 fs/namei.c:4156
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3113 [inline]
check_prevs_add kernel/locking/lockdep.c:3232 [inline]
validate_chain+0x166b/0x58f0 kernel/locking/lockdep.c:3847
__lock_acquire+0x1316/0x2070 kernel/locking/lockdep.c:5088
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705
down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1689
inode_lock_nested include/linux/fs.h:810 [inline]
open_xa_root fs/reiserfs/xattr.c:128 [inline]
open_xa_dir+0x136/0x610 fs/reiserfs/xattr.c:153
xattr_lookup+0x24/0x280 fs/reiserfs/xattr.c:396
reiserfs_xattr_get+0xfd/0x570 fs/reiserfs/xattr.c:678
__vfs_getxattr+0x436/0x470 fs/xattr.c:424
smk_fetch+0xb1/0x140 security/smack/smack_lsm.c:295
smack_d_instantiate+0x6d9/0xb40 security/smack/smack_lsm.c:3475
security_d_instantiate+0x9b/0xf0 security/security.c:3760
d_instantiate_new+0x65/0x120 fs/dcache.c:2053
reiserfs_mkdir+0x769/0x8f0 fs/reiserfs/namei.c:877
vfs_mkdir+0x29d/0x450 fs/namei.c:4115
do_mkdirat+0x264/0x520 fs/namei.c:4138
__do_sys_mkdir fs/namei.c:4158 [inline]
__se_sys_mkdir fs/namei.c:4156 [inline]
__x64_sys_mkdir+0x6e/0x80 fs/namei.c:4156
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sbi->lock);
lock(&type->i_mutex_dir_key#6/3);
lock(&sbi->lock);
lock(&type->i_mutex_dir_key#6/3);
*** DEADLOCK ***
3 locks held by syz-executor348/4995:
#0: ffff88807c26e460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394
#1: ffff888078af82e0 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline]
#1: ffff888078af82e0 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3884
#2: ffff8880156ec090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 fs/reiserfs/lock.c:78
stack backtrace:
CPU: 0 PID: 4995 Comm: syz-executor348 Not tainted 6.4.0-rc6-syzkaller-00195-g40f71e7cd3c6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
check_noncircular+0x2fe/0x3b0 kernel/locking/lockdep.c:2188
check_prev_add kernel/locking/lockdep.c:3113 [inline]
check_prevs_add kernel/locking/lockdep.c:3232 [inline]
validate_chain+0x166b/0x58f0 kernel/locking/lockdep.c:3847
__lock_acquire+0x1316/0x2070 kernel/locking/lockdep.c:5088
lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705
down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1689
inode_lock_nested include/linux/fs.h:810 [inline]
open_xa_root fs/reiserfs/xattr.c:128 [inline]
open_xa_dir+0x136/0x610 fs/reiserfs/xattr.c:153
xattr_lookup+0x24/0x280 fs/reiserfs/xattr.c:396
reiserfs_xattr_get+0xfd/0x570 fs/reiserfs/xattr.c:678
__vfs_getxattr+0x436/0x470 fs/xattr.c:424
smk_fetch+0xb1/0x140 security/smack/smack_lsm.c:295
smack_d_instantiate+0x6d9/0xb40 security/smack/smack_lsm.c:3475
security_d_instantiate+0x9b/0xf0 security/security.c:3760
d_instantiate_new+0x65/0x120 fs/dcache.c:2053
reiserfs_mkdir+0x769/0x8f0 fs/reiserfs/namei.c:877
vfs_mkdir+0x29d/0x450 fs/namei.c:4115
do_mkdirat+0x264/0x520 fs/namei.c:4138
__do_sys_mkdir fs/namei.c:4158 [inline]
__se_sys_mkdir fs/namei.c:4156 [inline]
__x64_sys_mkdir+0x6e/0x80 fs/namei.c:4156
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5ca09ba7a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc45722308 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5ca09ba7a9
RDX: 00007f5ca0978e23 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007f5ca097a040 R08: 00000000000010e8 R09: 0000000000000000
R10: 00007ffc457221d0 R11: 000000000000024