REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. ====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc7-syzkaller-00018-g0983f6bf2bfc #0 Not tainted ------------------------------------------------------ syz-executor.4/11356 is trying to acquire lock: ffff88802ea3dfa0 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] ffff88802ea3dfa0 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}, at: xattr_rmdir fs/reiserfs/xattr.c:106 [inline] ffff88802ea3dfa0 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}, at: delete_one_xattr+0x141/0x2d0 fs/reiserfs/xattr.c:338 but task is already holding lock: ffff888033895900 (&type->i_mutex_dir_key#13/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] ffff888033895900 (&type->i_mutex_dir_key#13/3){+.+.}-{3:3}, at: reiserfs_for_each_xattr+0x6fd/0x9a0 fs/reiserfs/xattr.c:309 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&type->i_mutex_dir_key#13/3){+.+.}-{3:3}: down_write_nested+0x98/0x220 kernel/locking/rwsem.c:1672 inode_lock_nested include/linux/fs.h:791 [inline] open_xa_root fs/reiserfs/xattr.c:127 [inline] open_xa_dir+0x127/0x830 fs/reiserfs/xattr.c:152 reiserfs_for_each_xattr+0x1ab/0x9a0 fs/reiserfs/xattr.c:252 reiserfs_delete_xattrs+0x20/0xa0 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x2e7/0x540 fs/reiserfs/inode.c:53 evict+0x2ed/0x6b0 fs/inode.c:664 iput_final fs/inode.c:1747 [inline] iput.part.0+0x59b/0x880 fs/inode.c:1773 iput+0x5c/0x80 fs/inode.c:1763 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401 __dentry_kill+0x3c0/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x651/0xdb0 fs/dcache.c:913 do_renameat2+0xb32/0xc30 fs/namei.c:4932 __do_sys_renameat2 fs/namei.c:4963 [inline] __se_sys_renameat2 fs/namei.c:4960 [inline] __x64_sys_renameat2+0xe8/0x120 fs/namei.c:4960 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&type->i_mutex_dir_key#13/2){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_write_nested+0x98/0x220 kernel/locking/rwsem.c:1672 inode_lock_nested include/linux/fs.h:791 [inline] xattr_rmdir fs/reiserfs/xattr.c:106 [inline] delete_one_xattr+0x141/0x2d0 fs/reiserfs/xattr.c:338 reiserfs_for_each_xattr+0x70e/0x9a0 fs/reiserfs/xattr.c:311 reiserfs_delete_xattrs+0x20/0xa0 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x2e7/0x540 fs/reiserfs/inode.c:53 evict+0x2ed/0x6b0 fs/inode.c:664 iput_final fs/inode.c:1747 [inline] iput.part.0+0x59b/0x880 fs/inode.c:1773 iput+0x5c/0x80 fs/inode.c:1763 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401 __dentry_kill+0x3c0/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x651/0xdb0 fs/dcache.c:913 ovl_create_over_whiteout fs/overlayfs/dir.c:551 [inline] ovl_create_or_link+0x1059/0x1780 fs/overlayfs/dir.c:613 ovl_create_object+0x20b/0x290 fs/overlayfs/dir.c:647 vfs_mkdir+0x48d/0x740 fs/namei.c:4036 do_mkdirat+0x27b/0x2f0 fs/namei.c:4061 __do_sys_mkdir fs/namei.c:4081 [inline] __se_sys_mkdir fs/namei.c:4079 [inline] __x64_sys_mkdir+0xf6/0x140 fs/namei.c:4079 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 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(&type->i_mutex_dir_key#13/3); lock(&type->i_mutex_dir_key#13/2); lock(&type->i_mutex_dir_key#13/3); lock(&type->i_mutex_dir_key#13/2); *** DEADLOCK *** 7 locks held by syz-executor.4/11356: #0: ffff8880403dc460 (sb_writers#17){.+.+}-{0:0}, at: filename_create+0xf1/0x4a0 fs/namei.c:3800 #1: ffff88802eb4b030 (&ovl_i_mutex_dir_key[depth]/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff88802eb4b030 (&ovl_i_mutex_dir_key[depth]/1){+.+.}-{3:3}, at: filename_create+0x1aa/0x4a0 fs/namei.c:3807 #2: ffff88803314a460 (sb_writers#24){.+.+}-{0:0}, at: ovl_create_object+0x96/0x290 fs/overlayfs/dir.c:630 #3: ffff88803314a748 (&type->s_vfs_rename_key#2){+.+.}-{3:3}, at: lock_rename+0x58/0x280 fs/namei.c:2994 #4: ffff888033890980 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #4: ffff888033890980 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: lock_rename+0x1b0/0x280 fs/namei.c:3010 #5: ffff888033892400 (&type->i_mutex_dir_key#13/5){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #5: ffff888033892400 (&type->i_mutex_dir_key#13/5){+.+.}-{3:3}, at: lock_rename+0x1e4/0x280 fs/namei.c:3011 #6: ffff888033895900 (&type->i_mutex_dir_key#13/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #6: ffff888033895900 (&type->i_mutex_dir_key#13/3){+.+.}-{3:3}, at: reiserfs_for_each_xattr+0x6fd/0x9a0 fs/reiserfs/xattr.c:309 stack backtrace: CPU: 1 PID: 11356 Comm: syz-executor.4 Not tainted 6.2.0-rc7-syzkaller-00018-g0983f6bf2bfc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2177 check_prev_add kernel/locking/lockdep.c:3097 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 down_write_nested+0x98/0x220 kernel/locking/rwsem.c:1672 inode_lock_nested include/linux/fs.h:791 [inline] xattr_rmdir fs/reiserfs/xattr.c:106 [inline] delete_one_xattr+0x141/0x2d0 fs/reiserfs/xattr.c:338 reiserfs_for_each_xattr+0x70e/0x9a0 fs/reiserfs/xattr.c:311 reiserfs_delete_xattrs+0x20/0xa0 fs/reiserfs/xattr.c:364 reiserfs_evict_inode+0x2e7/0x540 fs/reiserfs/inode.c:53 evict+0x2ed/0x6b0 fs/inode.c:664 iput_final fs/inode.c:1747 [inline] iput.part.0+0x59b/0x880 fs/inode.c:1773 iput+0x5c/0x80 fs/inode.c:1763 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401 __dentry_kill+0x3c0/0x640 fs/dcache.c:607 dentry_kill fs/dcache.c:745 [inline] dput+0x651/0xdb0 fs/dcache.c:913 ovl_create_over_whiteout fs/overlayfs/dir.c:551 [inline] ovl_create_or_link+0x1059/0x1780 fs/overlayfs/dir.c:613 ovl_create_object+0x20b/0x290 fs/overlayfs/dir.c:647 vfs_mkdir+0x48d/0x740 fs/namei.c:4036 do_mkdirat+0x27b/0x2f0 fs/namei.c:4061 __do_sys_mkdir fs/namei.c:4081 [inline] __se_sys_mkdir fs/namei.c:4079 [inline] __x64_sys_mkdir+0xf6/0x140 fs/namei.c:4079 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f32f288c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f32f361f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f32f29abf80 RCX: 00007f32f288c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 00007f32f28e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcbb5cd9df R14: 00007f32f361f300 R15: 0000000000022000