REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using r5 hash to sort names
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
======================================================
WARNING: possible circular locking dependency detected
6.5.0-rc7-syzkaller-00104-g4f9e7fabf864 #0 Not tainted
------------------------------------------------------
syz-executor.0/5428 is trying to acquire lock:
ffff888076300980 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:806 [inline]
ffff888076300980 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:128 [inline]
ffff888076300980 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610 fs/reiserfs/xattr.c:153

but task is already holding lock:
ffff888145e66090 (&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}:
       __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:107
       reiserfs_new_inode+0x1631/0x1d40 fs/reiserfs/inode.c:2111
       reiserfs_create+0x3e7/0x6e0 fs/reiserfs/namei.c:666
       lookup_open fs/namei.c:3492 [inline]
       open_last_lookups fs/namei.c:3560 [inline]
       path_openat+0x13e7/0x3180 fs/namei.c:3790
       do_filp_open+0x234/0x490 fs/namei.c:3820
       do_sys_openat2+0x13e/0x1d0 fs/open.c:1407
       do_sys_open fs/open.c:1422 [inline]
       __do_sys_open fs/open.c:1430 [inline]
       __se_sys_open fs/open.c:1426 [inline]
       __x64_sys_open+0x225/0x270 fs/open.c:1426
       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#8/3){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3142 [inline]
       check_prevs_add kernel/locking/lockdep.c:3261 [inline]
       validate_chain kernel/locking/lockdep.c:3876 [inline]
       __lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5144
       lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5761
       down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1689
       inode_lock_nested include/linux/fs.h:806 [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:3504
       security_d_instantiate+0x9b/0xf0 security/security.c:3760
       d_instantiate_new+0x65/0x120 fs/dcache.c:2053
       reiserfs_create+0x5cf/0x6e0 fs/reiserfs/namei.c:692
       lookup_open fs/namei.c:3492 [inline]
       open_last_lookups fs/namei.c:3560 [inline]
       path_openat+0x13e7/0x3180 fs/namei.c:3790
       do_filp_open+0x234/0x490 fs/namei.c:3820
       do_sys_openat2+0x13e/0x1d0 fs/open.c:1407
       do_sys_open fs/open.c:1422 [inline]
       __do_sys_open fs/open.c:1430 [inline]
       __se_sys_open fs/open.c:1426 [inline]
       __x64_sys_open+0x225/0x270 fs/open.c:1426
       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#8/3);
                               lock(&sbi->lock);
  lock(&type->i_mutex_dir_key#8/3);

 *** DEADLOCK ***

3 locks held by syz-executor.0/5428:
 #0: ffff888029ce4410 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:403
 #1: ffff8880763002e0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
 #1: ffff8880763002e0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline]
 #1: ffff8880763002e0 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x7c2/0x3180 fs/namei.c:3790
 #2: ffff888145e66090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 fs/reiserfs/lock.c:78

stack backtrace:
CPU: 1 PID: 5428 Comm: syz-executor.0 Not tainted 6.5.0-rc7-syzkaller-00104-g4f9e7fabf864 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 check_noncircular+0x375/0x4a0 kernel/locking/lockdep.c:2195
 check_prev_add kernel/locking/lockdep.c:3142 [inline]
 check_prevs_add kernel/locking/lockdep.c:3261 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0x39ff/0x7f70 kernel/locking/lockdep.c:5144
 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5761
 down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1689
 inode_lock_nested include/linux/fs.h:806 [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:3504
 security_d_instantiate+0x9b/0xf0 security/security.c:3760
 d_instantiate_new+0x65/0x120 fs/dcache.c:2053
 reiserfs_create+0x5cf/0x6e0 fs/reiserfs/namei.c:692
 lookup_open fs/namei.c:3492 [inline]
 open_last_lookups fs/namei.c:3560 [inline]
 path_openat+0x13e7/0x3180 fs/namei.c:3790
 do_filp_open+0x234/0x490 fs/namei.c:3820
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_open fs/open.c:1430 [inline]
 __se_sys_open fs/open.c:1426 [inline]
 __x64_sys_open+0x225/0x270 fs/open.c:1426
 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: 0033:0x7f78c247c859
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f78c30ed0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f78c259bf80 RCX: 00007f78c247c859
RDX: 0000000000000000 RSI: 0000000000149042 RDI: 0000000020000200
RBP: 00007f78c24d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f78c259bf80 R15: 00007fffde177ac8
 </TASK>
================================================================================
UBSAN: array-index-out-of-bounds in fs/reiserfs/item_ops.c:485:3
index 1 is out of range for type '__u16[1]' (aka 'unsigned short[1]')
CPU: 1 PID: 5428 Comm: syz-executor.0 Not tainted 6.5.0-rc7-syzkaller-00104-g4f9e7fabf864 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 ubsan_epilogue lib/ubsan.c:217 [inline]
 __ubsan_handle_out_of_bounds+0x11c/0x150 lib/ubsan.c:348
 direntry_create_vi+0x7a9/0xf50 fs/reiserfs/item_ops.c:485
 create_virtual_node+0xa16/0x1bf0 fs/reiserfs/fix_node.c:115
 ip_check_balance fs/reiserfs/fix_node.c:1412 [inline]
 check_balance fs/reiserfs/fix_node.c:2083 [inline]
 fix_nodes+0x1fa8/0x8ce0 fs/reiserfs/fix_node.c:2635
 reiserfs_paste_into_item+0x654/0x870 fs/reiserfs/stree.c:2128
 reiserfs_get_block+0x2250/0x5130 fs/reiserfs/inode.c:1069
 __block_write_begin_int+0x555/0x1a60 fs/buffer.c:2128
 reiserfs_write_begin+0x24d/0x520 fs/reiserfs/inode.c:2773
 generic_cont_expand_simple+0x18b/0x2a0 fs/buffer.c:2488
 reiserfs_setattr+0x57d/0x1140 fs/reiserfs/inode.c:3304
 notify_change+0xc8b/0xf40 fs/attr.c:483
 do_truncate+0x220/0x300 fs/open.c:66
 do_sys_ftruncate+0x2f3/0x390 fs/open.c:194
 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: 0033:0x7f78c247c859
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f78c30ed0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f78c259bf80 RCX: 00007f78c247c859
RDX: 0000000000000000 RSI: 0000000000371001 RDI: 0000000000000004
RBP: 00007f78c24d8ad0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f78c259bf80 R15: 00007fffde177ac8
 </TASK>
================================================================================