REISERFS warning (device loop0): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount. ====================================================== WARNING: possible circular locking dependency detected 6.2.0-rc3-syzkaller-16387-g9598c377d828 #0 Not tainted ------------------------------------------------------ syz-executor.0/8525 is trying to acquire lock: ffff000119598908 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] ffff000119598908 (&type->i_mutex_dir_key#18){+.+.}-{3:3}, at: vfs_setxattr+0xd4/0x1f4 fs/xattr.c:322 but task is already holding lock: ffff000118268460 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x20/0x64 fs/namespace.c:508 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#27){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1814 [inline] sb_start_write+0x78/0x1e4 include/linux/fs.h:1889 mnt_want_write_file+0x28/0xd8 fs/namespace.c:552 reiserfs_ioctl+0x118/0x2a0 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xd0/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 -> #1 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common+0xd4/0xca8 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 reiserfs_write_lock+0x3c/0x64 fs/reiserfs/lock.c:27 reiserfs_lookup+0xa4/0x1c4 fs/reiserfs/namei.c:364 __lookup_slow+0x14c/0x204 fs/namei.c:1685 lookup_one_len+0x29c/0x384 fs/namei.c:2711 reiserfs_lookup_privroot+0x40/0xcc fs/reiserfs/xattr.c:973 reiserfs_fill_super+0xb58/0xf94 fs/reiserfs/super.c:2192 mount_bdev+0x1b8/0x210 fs/super.c:1359 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0x30/0x74 fs/fs_context.c:610 vfs_get_tree+0x40/0x140 fs/super.c:1489 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3145 path_mount+0x358/0x890 fs/namespace.c:3475 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount fs/namespace.c:3674 [inline] __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3674 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 -> #0 (&type->i_mutex_dir_key#18){+.+.}-{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+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_write+0x5c/0x88 kernel/locking/rwsem.c:1562 inode_lock include/linux/fs.h:756 [inline] vfs_setxattr+0xd4/0x1f4 fs/xattr.c:322 do_setxattr fs/xattr.c:608 [inline] setxattr fs/xattr.c:631 [inline] path_setxattr+0x32c/0x424 fs/xattr.c:650 __do_sys_setxattr fs/xattr.c:666 [inline] __se_sys_setxattr fs/xattr.c:662 [inline] __arm64_sys_setxattr+0x2c/0x40 fs/xattr.c:662 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Chain exists of: &type->i_mutex_dir_key#18 --> &sbi->lock --> sb_writers#27 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#27); lock(&sbi->lock); lock(sb_writers#27); lock(&type->i_mutex_dir_key#18); *** DEADLOCK *** 1 lock held by syz-executor.0/8525: #0: ffff000118268460 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x20/0x64 fs/namespace.c:508 stack backtrace: CPU: 0 PID: 8525 Comm: syz-executor.0 Not tainted 6.2.0-rc3-syzkaller-16387-g9598c377d828 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x2c4/0x2c8 kernel/locking/lockdep.c:2055 check_noncircular+0x14c/0x154 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+0x1530/0x3084 kernel/locking/lockdep.c:5055 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5668 down_write+0x5c/0x88 kernel/locking/rwsem.c:1562 inode_lock include/linux/fs.h:756 [inline] vfs_setxattr+0xd4/0x1f4 fs/xattr.c:322 do_setxattr fs/xattr.c:608 [inline] setxattr fs/xattr.c:631 [inline] path_setxattr+0x32c/0x424 fs/xattr.c:650 __do_sys_setxattr fs/xattr.c:666 [inline] __se_sys_setxattr fs/xattr.c:662 [inline] __arm64_sys_setxattr+0x2c/0x40 fs/xattr.c:662 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x104 arch/arm64/kernel/syscall.c:193 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584