REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
6.7.0-rc8-syzkaller-g0802e17d9aca #0 Not tainted
------------------------------------------------------
syz-executor.2/14102 is trying to acquire lock:
ffff000127ab82e0 (&type->i_mutex_dir_key#14/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
ffff000127ab82e0 (&type->i_mutex_dir_key#14/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:128 [inline]
ffff000127ab82e0 (&type->i_mutex_dir_key#14/3){+.+.}-{3:3}, at: open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153

but task is already holding lock:
ffff0000c2383090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x68/0xd8 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}:
       __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
       __mutex_lock kernel/locking/mutex.c:747 [inline]
       mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799
       reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27
       reiserfs_mkdir+0x280/0x77c 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+0x288/0x578 fs/reiserfs/xattr.c:153
       xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:396
       reiserfs_xattr_set_handle+0xe0/0xe94 fs/reiserfs/xattr.c:535
       reiserfs_security_write+0x13c/0x1d0 fs/reiserfs/xattr_security.c:107
       reiserfs_new_inode+0x1084/0x1698 fs/reiserfs/inode.c:2105
       reiserfs_mknod+0x33c/0x5a8 fs/reiserfs/namei.c:746
       vfs_mknod+0x330/0x360 fs/namei.c:3984
       do_mknodat+0x42c/0x564
       __do_sys_mknodat fs/namei.c:4062 [inline]
       __se_sys_mknodat fs/namei.c:4059 [inline]
       __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4059
       __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
       el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
       el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
       el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595

-> #0 (&type->i_mutex_dir_key#14/3){+.+.}-{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+0x3384/0x763c kernel/locking/lockdep.c:5137
       lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754
       down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1695
       inode_lock_nested include/linux/fs.h:837 [inline]
       open_xa_root fs/reiserfs/xattr.c:128 [inline]
       open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153
       xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:396
       reiserfs_xattr_get+0xf0/0x96c fs/reiserfs/xattr.c:679
       security_get+0x94/0xd0 fs/reiserfs/xattr_security.c:19
       __vfs_getxattr+0x394/0x3c0 fs/xattr.c:424
       smk_fetch+0xc8/0x150 security/smack/smack_lsm.c:304
       smack_d_instantiate+0x594/0x880 security/smack/smack_lsm.c:3573
       security_d_instantiate+0x98/0xf0 security/security.c:3799
       d_instantiate_new+0x64/0x120 fs/dcache.c:2052
       reiserfs_mknod+0x508/0x5a8 fs/reiserfs/namei.c:776
       vfs_mknod+0x330/0x360 fs/namei.c:3984
       do_mknodat+0x42c/0x564
       __do_sys_mknodat fs/namei.c:4062 [inline]
       __se_sys_mknodat fs/namei.c:4059 [inline]
       __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4059
       __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
       el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
       el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
       el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&sbi->lock);
                               lock(&type->i_mutex_dir_key#14/3);
                               lock(&sbi->lock);
  lock(&type->i_mutex_dir_key#14/3);

 *** DEADLOCK ***

3 locks held by syz-executor.2/14102:
 #0: ffff0000dc23c418 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:404
 #1: ffff00012b0002e0 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
 #1: ffff00012b0002e0 (&type->i_mutex_dir_key#14/1){+.+.}-{3:3}, at: filename_create+0x204/0x468 fs/namei.c:3875
 #2: ffff0000c2383090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x68/0xd8 fs/reiserfs/lock.c:78

stack backtrace:
CPU: 0 PID: 14102 Comm: syz-executor.2 Not tainted 6.7.0-rc8-syzkaller-g0802e17d9aca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 dump_stack+0x1c/0x28 lib/dump_stack.c:113
 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2060
 check_noncircular+0x310/0x404 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+0x3384/0x763c kernel/locking/lockdep.c:5137
 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754
 down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1695
 inode_lock_nested include/linux/fs.h:837 [inline]
 open_xa_root fs/reiserfs/xattr.c:128 [inline]
 open_xa_dir+0x11c/0x578 fs/reiserfs/xattr.c:153
 xattr_lookup+0x3c/0x268 fs/reiserfs/xattr.c:396
 reiserfs_xattr_get+0xf0/0x96c fs/reiserfs/xattr.c:679
 security_get+0x94/0xd0 fs/reiserfs/xattr_security.c:19
 __vfs_getxattr+0x394/0x3c0 fs/xattr.c:424
 smk_fetch+0xc8/0x150 security/smack/smack_lsm.c:304
 smack_d_instantiate+0x594/0x880 security/smack/smack_lsm.c:3573
 security_d_instantiate+0x98/0xf0 security/security.c:3799
 d_instantiate_new+0x64/0x120 fs/dcache.c:2052
 reiserfs_mknod+0x508/0x5a8 fs/reiserfs/namei.c:776
 vfs_mknod+0x330/0x360 fs/namei.c:3984
 do_mknodat+0x42c/0x564
 __do_sys_mknodat fs/namei.c:4062 [inline]
 __se_sys_mknodat fs/namei.c:4059 [inline]
 __arm64_sys_mknodat+0xb0/0xcc fs/namei.c:4059
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595