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 6.5.0-rc4-syzkaller-00251-gf0ab9f34e59e #0 Not tainted ------------------------------------------------------ syz-executor.2/31152 is trying to acquire lock: ffff8880363a7bc0 (&type->i_mutex_dir_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] ffff8880363a7bc0 (&type->i_mutex_dir_key#10){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] ffff8880363a7bc0 (&type->i_mutex_dir_key#10){+.+.}-{3:3}, at: path_openat+0x8c9/0x29c0 fs/namei.c:3790 but task is already holding lock: ffff88805723e410 (sb_writers#19){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3549 [inline] ffff88805723e410 (sb_writers#19){.+.+}-{0:0}, at: path_openat+0x197e/0x29c0 fs/namei.c:3790 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#19){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1494 [inline] sb_start_write include/linux/fs.h:1569 [inline] mnt_want_write_file+0x98/0x600 fs/namespace.c:447 reiserfs_ioctl+0x19e/0x320 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] __x64_sys_ioctl+0x18f/0x210 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&sbi->lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x181/0x1340 kernel/locking/mutex.c:747 reiserfs_write_lock+0x79/0x100 fs/reiserfs/lock.c:27 reiserfs_lookup+0x184/0x690 fs/reiserfs/namei.c:364 __lookup_slow+0x24d/0x450 fs/namei.c:1690 lookup_one_len+0x17d/0x1b0 fs/namei.c:2742 reiserfs_lookup_privroot+0x94/0x200 fs/reiserfs/xattr.c:976 reiserfs_fill_super+0x1ab6/0x3150 fs/reiserfs/super.c:2192 mount_bdev+0x30d/0x3d0 fs/super.c:1391 legacy_get_tree+0x109/0x220 fs/fs_context.c:611 vfs_get_tree+0x88/0x350 fs/super.c:1519 do_new_mount fs/namespace.c:3335 [inline] path_mount+0x1492/0x1ed0 fs/namespace.c:3662 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (&type->i_mutex_dir_key#10){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726 down_write+0x93/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:771 [inline] open_last_lookups fs/namei.c:3557 [inline] path_openat+0x8c9/0x29c0 fs/namei.c:3790 do_filp_open+0x1de/0x430 fs/namei.c:3820 do_sys_openat2+0x176/0x1e0 fs/open.c:1407 do_sys_open fs/open.c:1422 [inline] __do_sys_openat fs/open.c:1438 [inline] __se_sys_openat fs/open.c:1433 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: &type->i_mutex_dir_key#10 --> &sbi->lock --> sb_writers#19 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(sb_writers#19); lock(&sbi->lock); lock(sb_writers#19); lock(&type->i_mutex_dir_key#10); *** DEADLOCK *** 1 lock held by syz-executor.2/31152: #0: ffff88805723e410 (sb_writers#19){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3549 [inline] #0: ffff88805723e410 (sb_writers#19){.+.+}-{0:0}, at: path_openat+0x197e/0x29c0 fs/namei.c:3790 stack backtrace: CPU: 0 PID: 31152 Comm: syz-executor.2 Not tainted 6.5.0-rc4-syzkaller-00251-gf0ab9f34e59e #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x311/0x3f0 kernel/locking/lockdep.c:2195 check_prev_add kernel/locking/lockdep.c:3142 [inline] check_prevs_add kernel/locking/lockdep.c:3261 [inline] validate_chain kernel/locking/lockdep.c:3876 [inline] __lock_acquire+0x2e3d/0x5de0 kernel/locking/lockdep.c:5144 lock_acquire kernel/locking/lockdep.c:5761 [inline] lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726 down_write+0x93/0x200 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:771 [inline] open_last_lookups fs/namei.c:3557 [inline] path_openat+0x8c9/0x29c0 fs/namei.c:3790 do_filp_open+0x1de/0x430 fs/namei.c:3820 do_sys_openat2+0x176/0x1e0 fs/open.c:1407 do_sys_open fs/open.c:1422 [inline] __do_sys_openat fs/open.c:1438 [inline] __se_sys_openat fs/open.c:1433 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5573a7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f55747ff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f5573b9bf80 RCX: 00007f5573a7cae9 RDX: 000000000002b442 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007f5573ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f5573b9bf80 R15: 00007ffcc4864348 REISERFS warning (device loop2): reiserfs-15100 reiserfs_get_unused_objectid: no more object ids