REISERFS (device loop6): Using tea hash to sort names REISERFS (device loop6): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.6.1003/8572 is trying to acquire lock: ffff88805f2b3140 (&type->i_mutex_dir_key#10/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] ffff88805f2b3140 (&type->i_mutex_dir_key#10/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:127 [inline] ffff88805f2b3140 (&type->i_mutex_dir_key#10/3){+.+.}-{3:3}, at: open_xa_dir+0x11d/0x6b0 fs/reiserfs/xattr.c:152 but task is already holding lock: ffff8880739a7090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/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+0x1eb/0x2390 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+0x75/0xd0 fs/reiserfs/lock.c:27 reiserfs_mkdir+0x30c/0x970 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+0x318/0x6b0 fs/reiserfs/xattr.c:152 xattr_lookup+0x22/0x2a0 fs/reiserfs/xattr.c:395 reiserfs_xattr_set_handle+0xf4/0xf20 fs/reiserfs/xattr.c:540 reiserfs_xattr_set+0x435/0x550 fs/reiserfs/xattr.c:640 __vfs_setxattr+0x3e0/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216 vfs_setxattr+0x168/0x2f0 fs/xattr.c:303 ovl_do_setxattr fs/overlayfs/overlayfs.h:214 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:225 [inline] ovl_make_workdir fs/overlayfs/super.c:1422 [inline] ovl_get_workdir+0x948/0x11a0 fs/overlayfs/super.c:1526 ovl_fill_super+0x1925/0x2ae0 fs/overlayfs/super.c:2082 mount_nodev+0x52/0xe0 fs/super.c:1446 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x24a/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&type->i_mutex_dir_key#10/3){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667 inode_lock_nested include/linux/fs.h:822 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x11d/0x6b0 fs/reiserfs/xattr.c:152 reiserfs_for_each_xattr+0x174/0x7b0 fs/reiserfs/xattr.c:252 reiserfs_delete_xattrs+0x1c/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x22e/0x490 fs/reiserfs/inode.c:53 evict+0x485/0x870 fs/inode.c:647 reiserfs_create+0x336/0x680 fs/reiserfs/namei.c:-1 vfs_create+0x2db/0x460 fs/namei.c:3170 do_mknodat+0x39d/0x620 fs/namei.c:4002 __do_sys_mknodat fs/namei.c:4030 [inline] __se_sys_mknodat fs/namei.c:4027 [inline] __x64_sys_mknodat+0xa5/0xc0 fs/namei.c:4027 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 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#10/3); lock(&sbi->lock); lock(&type->i_mutex_dir_key#10/3); *** DEADLOCK *** 3 locks held by syz.6.1003/8572: #0: ffff8881473d6460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff88805f2b2aa0 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #1: ffff88805f2b2aa0 (&type->i_mutex_dir_key#10/1){+.+.}-{3:3}, at: filename_create+0x1f2/0x450 fs/namei.c:3843 #2: ffff8880739a7090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78 stack backtrace: CPU: 0 PID: 8572 Comm: syz.6.1003 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 check_noncircular+0x274/0x310 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 kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667 inode_lock_nested include/linux/fs.h:822 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x11d/0x6b0 fs/reiserfs/xattr.c:152 reiserfs_for_each_xattr+0x174/0x7b0 fs/reiserfs/xattr.c:252 reiserfs_delete_xattrs+0x1c/0x80 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x22e/0x490 fs/reiserfs/inode.c:53 evict+0x485/0x870 fs/inode.c:647 reiserfs_create+0x336/0x680 fs/reiserfs/namei.c:-1 vfs_create+0x2db/0x460 fs/namei.c:3170 do_mknodat+0x39d/0x620 fs/namei.c:4002 __do_sys_mknodat fs/namei.c:4030 [inline] __se_sys_mknodat fs/namei.c:4027 [inline] __x64_sys_mknodat+0xa5/0xc0 fs/namei.c:4027 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f4661b2e749 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:00007f465fd95038 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 RAX: ffffffffffffffda RBX: 00007f4661d84fa0 RCX: 00007f4661b2e749 RDX: 0000000000008000 RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007f4661bb2f91 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000070d R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4661d85038 R14: 00007f4661d84fa0 R15: 00007ffdfa0fae78