====================================================== WARNING: possible circular locking dependency detected 5.15.164-syzkaller #0 Not tainted ------------------------------------------------------ syz.2.2011/11880 is trying to acquire lock: ffff88806242be80 (&type->i_mutex_dir_key#26/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline] ffff88806242be80 (&type->i_mutex_dir_key#26/2){+.+.}-{3:3}, at: xattr_rmdir fs/reiserfs/xattr.c:106 [inline] ffff88806242be80 (&type->i_mutex_dir_key#26/2){+.+.}-{3:3}, at: delete_one_xattr+0x102/0x2f0 fs/reiserfs/xattr.c:338 but task is already holding lock: ffff88806242b7e0 (&type->i_mutex_dir_key#26/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline] ffff88806242b7e0 (&type->i_mutex_dir_key#26/3){+.+.}-{3:3}, at: reiserfs_for_each_xattr+0x9a4/0xb40 fs/reiserfs/xattr.c:309 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&type->i_mutex_dir_key#26/3){+.+.}-{3:3}: 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 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 -> #1 (&type->i_mutex_dir_key#26){++++}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] vfs_rename+0x814/0x10f0 fs/namei.c:4797 do_renameat2+0xe0f/0x1700 fs/namei.c:4985 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __x64_sys_renameat2+0xce/0xe0 fs/namei.c:5015 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#26/2){+.+.}-{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] xattr_rmdir fs/reiserfs/xattr.c:106 [inline] delete_one_xattr+0x102/0x2f0 fs/reiserfs/xattr.c:338 reiserfs_for_each_xattr+0x9b2/0xb40 fs/reiserfs/xattr.c:311 reiserfs_delete_xattrs+0x1b/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x20c/0x460 fs/reiserfs/inode.c:53 evict+0x2a4/0x620 fs/inode.c:587 d_delete_notify include/linux/fsnotify.h:267 [inline] vfs_rmdir+0x33c/0x460 fs/namei.c:4162 do_rmdir+0x368/0x670 fs/namei.c:4210 __do_sys_unlinkat fs/namei.c:4390 [inline] __se_sys_unlinkat fs/namei.c:4384 [inline] __x64_sys_unlinkat+0xdc/0xf0 fs/namei.c:4384 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: Chain exists of: &type->i_mutex_dir_key#26/2 --> &type->i_mutex_dir_key#26 --> &type->i_mutex_dir_key#26/3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&type->i_mutex_dir_key#26/3); lock(&type->i_mutex_dir_key#26); lock(&type->i_mutex_dir_key#26/3); lock(&type->i_mutex_dir_key#26/2); *** DEADLOCK *** 3 locks held by syz.2.2011/11880: #0: ffff888021400460 (sb_writers#32){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 #1: ffff888062429d60 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline] #1: ffff888062429d60 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: do_rmdir+0x225/0x670 fs/namei.c:4197 #2: ffff88806242b7e0 (&type->i_mutex_dir_key#26/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline] #2: ffff88806242b7e0 (&type->i_mutex_dir_key#26/3){+.+.}-{3:3}, at: reiserfs_for_each_xattr+0x9a4/0xb40 fs/reiserfs/xattr.c:309 stack backtrace: CPU: 0 PID: 11880 Comm: syz.2.2011 Not tainted 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 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] xattr_rmdir fs/reiserfs/xattr.c:106 [inline] delete_one_xattr+0x102/0x2f0 fs/reiserfs/xattr.c:338 reiserfs_for_each_xattr+0x9b2/0xb40 fs/reiserfs/xattr.c:311 reiserfs_delete_xattrs+0x1b/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x20c/0x460 fs/reiserfs/inode.c:53 evict+0x2a4/0x620 fs/inode.c:587 d_delete_notify include/linux/fsnotify.h:267 [inline] vfs_rmdir+0x33c/0x460 fs/namei.c:4162 do_rmdir+0x368/0x670 fs/namei.c:4210 __do_sys_unlinkat fs/namei.c:4390 [inline] __se_sys_unlinkat fs/namei.c:4384 [inline] __x64_sys_unlinkat+0xdc/0xf0 fs/namei.c:4384 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: 0033:0x7f1f190119f9 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:00007f1f1746d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 00007f1f191ae058 RCX: 00007f1f190119f9 RDX: 0000000000000200 RSI: 00000000200000c0 RDI: 0000000000000008 RBP: 00007f1f1907f8ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f1f191ae058 R15: 00007ffe290b7a38