REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 SD] (nlink == 4) not found (pos 2) REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 5.15.173-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.564/7551 is trying to acquire lock: ffff888074ad82e0 (&type->i_mutex_dir_key#16/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline] ffff888074ad82e0 (&type->i_mutex_dir_key#16/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:127 [inline] ffff888074ad82e0 (&type->i_mutex_dir_key#16/3){+.+.}-{3:3}, at: open_xa_dir+0x132/0x610 fs/reiserfs/xattr.c:152 but task is already holding lock: ffff88806203e090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5b/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+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 reiserfs_write_lock+0x76/0xd0 fs/reiserfs/lock.c:27 reiserfs_mkdir+0x31d/0x8f0 fs/reiserfs/namei.c:831 xattr_mkdir fs/reiserfs/xattr.c:76 [inline] open_xa_root fs/reiserfs/xattr.c:136 [inline] open_xa_dir+0x2c9/0x610 fs/reiserfs/xattr.c:152 xattr_lookup+0x24/0x280 fs/reiserfs/xattr.c:395 reiserfs_xattr_set_handle+0x100/0x10b0 fs/reiserfs/xattr.c:540 reiserfs_xattr_set+0x44e/0x570 fs/reiserfs/xattr.c:640 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x27e/0x2e0 fs/xattr.c:611 path_setxattr+0x1bc/0x2a0 fs/xattr.c:630 __do_sys_lsetxattr fs/xattr.c:653 [inline] __se_sys_lsetxattr fs/xattr.c:649 [inline] __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:649 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&type->i_mutex_dir_key#16/3){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667 inode_lock_nested include/linux/fs.h:824 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x132/0x610 fs/reiserfs/xattr.c:152 reiserfs_for_each_xattr+0x1a4/0xb40 fs/reiserfs/xattr.c:252 reiserfs_delete_xattrs+0x1b/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x20c/0x460 fs/reiserfs/inode.c:53 evict+0x529/0x930 fs/inode.c:622 reiserfs_mkdir+0x39e/0x8f0 vfs_mkdir+0x3b6/0x590 fs/namei.c:4065 do_mkdirat+0x260/0x520 fs/namei.c:4090 __do_sys_mkdirat fs/namei.c:4105 [inline] __se_sys_mkdirat fs/namei.c:4103 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4103 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(&type->i_mutex_dir_key#16/3); lock(&sbi->lock); lock(&type->i_mutex_dir_key#16/3); *** DEADLOCK *** 3 locks held by syz.0.564/7551: #0: ffff88807eb14460 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 #1: ffff888074ad8980 (&type->i_mutex_dir_key#16/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline] #1: ffff888074ad8980 (&type->i_mutex_dir_key#16/1){+.+.}-{3:3}, at: filename_create+0x25c/0x530 fs/namei.c:3835 #2: ffff88806203e090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5b/0xd0 fs/reiserfs/lock.c:78 stack backtrace: CPU: 1 PID: 7551 Comm: syz.0.564 Not tainted 5.15.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667 inode_lock_nested include/linux/fs.h:824 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x132/0x610 fs/reiserfs/xattr.c:152 reiserfs_for_each_xattr+0x1a4/0xb40 fs/reiserfs/xattr.c:252 reiserfs_delete_xattrs+0x1b/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x20c/0x460 fs/reiserfs/inode.c:53 evict+0x529/0x930 fs/inode.c:622 reiserfs_mkdir+0x39e/0x8f0 vfs_mkdir+0x3b6/0x590 fs/namei.c:4065 do_mkdirat+0x260/0x520 fs/namei.c:4090 __do_sys_mkdirat fs/namei.c:4105 [inline] __se_sys_mkdirat fs/namei.c:4103 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4103 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f12584e6747 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f125635de88 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f125635df10 RCX: 00007f12584e6747 RDX: 00000000000001ff RSI: 0000000020000440 RDI: 00000000ffffff9c RBP: 0000000000000000 R08: 0000000020000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000440 R13: 00007f125635ded0 R14: 0000000000000000 R15: 0000000000000000