REISERFS warning (device loop2): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount. ====================================================== WARNING: possible circular locking dependency detected 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Not tainted ------------------------------------------------------ syz-executor.2/12409 is trying to acquire lock: ffff0001389a0980 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] ffff0001389a0980 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: chown_common+0x348/0x700 fs/open.c:764 but task is already holding lock: ffff00013955a460 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:438 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:1477 [inline] sb_start_write+0x60/0x2ec include/linux/fs.h:1552 mnt_want_write_file+0x64/0x1e8 fs/namespace.c:438 reiserfs_ioctl+0x184/0x454 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+0x14c/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c 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:591 -> #1 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7c/0xe8 fs/reiserfs/lock.c:27 reiserfs_lookup+0x130/0x3c4 fs/reiserfs/namei.c:364 __lookup_slow+0x250/0x374 fs/namei.c:1686 lookup_one_len+0x178/0x28c fs/namei.c:2712 reiserfs_lookup_privroot+0x8c/0x204 fs/reiserfs/xattr.c:973 reiserfs_fill_super+0x15b4/0x2028 fs/reiserfs/super.c:2192 mount_bdev+0x26c/0x368 fs/super.c:1380 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610 vfs_get_tree+0x90/0x274 fs/super.c:1510 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042 path_mount+0x590/0xe04 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c 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:591 -> #0 (&type->i_mutex_dir_key#18){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669 down_write+0x50/0xc0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] chown_common+0x348/0x700 fs/open.c:764 vfs_fchown fs/open.c:842 [inline] ksys_fchown+0xe0/0x158 fs/open.c:853 __do_sys_fchown fs/open.c:861 [inline] __se_sys_fchown fs/open.c:859 [inline] __arm64_sys_fchown+0x7c/0x94 fs/open.c:859 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c 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:591 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.2/12409: #0: ffff00013955a460 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:438 stack backtrace: CPU: 1 PID: 12409 Comm: syz-executor.2 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2056 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3098 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056 lock_acquire+0x238/0x718 kernel/locking/lockdep.c:5669 down_write+0x50/0xc0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] chown_common+0x348/0x700 fs/open.c:764 vfs_fchown fs/open.c:842 [inline] ksys_fchown+0xe0/0x158 fs/open.c:853 __do_sys_fchown fs/open.c:861 [inline] __se_sys_fchown fs/open.c:859 [inline] __arm64_sys_fchown+0x7c/0x94 fs/open.c:859 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c 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:591