REISERFS (device loop1): Using tea hash to sort names REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. ====================================================== WARNING: possible circular locking dependency detected 5.15.157-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/10350 is trying to acquire lock: ffff8880526b02e0 (&type->i_mutex_dir_key#25){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] ffff8880526b02e0 (&type->i_mutex_dir_key#25){+.+.}-{3:3}, at: chown_common+0x499/0x890 fs/open.c:674 but task is already holding lock: ffff88807bf4a460 (sb_writers#37){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sb_writers#37){.+.+}-{0:0}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_write+0x4f/0x1c0 include/linux/fs.h:1881 mnt_want_write_file+0x5a/0x1f0 fs/namespace.c:421 reiserfs_ioctl+0x170/0x340 fs/reiserfs/ioctl.c:103 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (&sbi->lock){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1da/0x25a0 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+0x76/0xd0 fs/reiserfs/lock.c:27 reiserfs_lookup+0x15c/0x4b0 fs/reiserfs/namei.c:364 __lookup_slow+0x275/0x3d0 fs/namei.c:1663 lookup_one_len+0x187/0x2d0 fs/namei.c:2718 reiserfs_lookup_privroot+0x85/0x1e0 fs/reiserfs/xattr.c:980 reiserfs_fill_super+0x2224/0x2690 fs/reiserfs/super.c:2178 mount_bdev+0x2c9/0x3f0 fs/super.c:1387 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1517 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&type->i_mutex_dir_key#25){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] chown_common+0x499/0x890 fs/open.c:674 do_fchownat+0x169/0x240 fs/open.c:711 __do_sys_fchownat fs/open.c:726 [inline] __se_sys_fchownat fs/open.c:723 [inline] __x64_sys_fchownat+0xb1/0xc0 fs/open.c:723 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &type->i_mutex_dir_key#25 --> &sbi->lock --> sb_writers#37 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#37); lock(&sbi->lock); lock(sb_writers#37); lock(&type->i_mutex_dir_key#25); *** DEADLOCK *** 1 lock held by syz-executor.1/10350: #0: ffff88807bf4a460 (sb_writers#37){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377 stack backtrace: CPU: 1 PID: 10350 Comm: syz-executor.1 Not tainted 5.15.157-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 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+0x1649/0x5930 kernel/locking/lockdep.c:3788 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] chown_common+0x499/0x890 fs/open.c:674 do_fchownat+0x169/0x240 fs/open.c:711 __do_sys_fchownat fs/open.c:726 [inline] __se_sys_fchownat fs/open.c:723 [inline] __x64_sys_fchownat+0xb1/0xc0 fs/open.c:723 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f8763d47ea9 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:00007f87622ba0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000104 RAX: ffffffffffffffda RBX: 00007f8763e75f80 RCX: 00007f8763d47ea9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007f8763d944a4 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8763e75f80 R15: 00007fff4bb789b8