ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected 6.6.101-syzkaller #0 Not tainted ------------------------------------------------------ syz.2.2533/16518 is trying to acquire lock: ffff88801ff689d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff88801ff689d8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x165/0x4360 fs/ocfs2/suballoc.c:782 but task is already holding lock: ffff888079c6b1b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x410/0x11f0 fs/ocfs2/xattr.c:3583 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #5 (&oi->ip_xattr_sem){++++}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x2fa/0x720 fs/ocfs2/acl.c:366 ocfs2_mknod+0x12e5/0x20f0 fs/ocfs2/namei.c:410 ocfs2_create+0x196/0x410 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3488 [inline] open_last_lookups fs/namei.c:3556 [inline] path_openat+0x1277/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_open fs/open.c:1442 [inline] __se_sys_open fs/open.c:1438 [inline] __x64_sys_open+0x11f/0x140 fs/open.c:1438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #4 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1e9d/0x20c0 fs/jbd2/transaction.c:448 jbd2__journal_start+0x2bb/0x5b0 fs/jbd2/transaction.c:505 jbd2_journal_start+0x2a/0x40 fs/jbd2/transaction.c:544 ocfs2_start_trans+0x376/0x6c0 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x201/0xa10 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1e2/0x890 fs/ocfs2/super.c:1883 generic_shutdown_super+0x134/0x2b0 fs/super.c:693 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #3 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520 ocfs2_start_trans+0x36a/0x6c0 fs/ocfs2/journal.c:372 ocfs2_shutdown_local_alloc+0x201/0xa10 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1e2/0x890 fs/ocfs2/super.c:1883 generic_shutdown_super+0x134/0x2b0 fs/super.c:693 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1250 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (sb_internal#5){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1633 [inline] sb_start_intwrite include/linux/fs.h:1755 [inline] ocfs2_start_trans+0x26b/0x6c0 fs/ocfs2/journal.c:370 ocfs2_symlink+0x1093/0x2550 fs/ocfs2/namei.c:1918 vfs_symlink+0x138/0x2b0 fs/namei.c:4473 do_symlinkat+0x1b2/0x3f0 fs/namei.c:4499 __do_sys_symlink fs/namei.c:4520 [inline] __se_sys_symlink fs/namei.c:4518 [inline] __x64_sys_symlink+0x7e/0x90 fs/namei.c:4518 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}: down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_local_alloc_bits+0x126/0x24b0 fs/ocfs2/localalloc.c:635 ocfs2_reserve_clusters_with_limit+0x1bf/0xba0 fs/ocfs2/suballoc.c:1162 ocfs2_mknod+0xdee/0x20f0 fs/ocfs2/namei.c:354 ocfs2_create+0x196/0x410 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3488 [inline] open_last_lookups fs/namei.c:3556 [inline] path_openat+0x1277/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_open fs/open.c:1442 [inline] __se_sys_open fs/open.c:1438 [inline] __x64_sys_open+0x11f/0x140 fs/open.c:1438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_suballoc_bits+0x165/0x4360 fs/ocfs2/suballoc.c:782 ocfs2_reserve_new_metadata_blocks+0x404/0x940 fs/ocfs2/suballoc.c:978 ocfs2_init_xattr_set_ctxt+0x2f8/0x6e0 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0xb6d/0x11f0 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x431/0x470 fs/xattr.c:201 __vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235 vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322 do_setxattr fs/xattr.c:630 [inline] __do_sys_fsetxattr fs/xattr.c:711 [inline] __se_sys_fsetxattr+0x426/0x4b0 fs/xattr.c:687 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6 --> jbd2_handle --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(jbd2_handle); lock(&oi->ip_xattr_sem); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6); *** DEADLOCK *** 3 locks held by syz.2.2533/16518: #0: ffff88807e08a418 (sb_writers#42){.+.+}-{0:0}, at: mnt_want_write_file+0x63/0x200 fs/namespace.c:447 #1: ffff888079c6b498 (&sb->s_type->i_mutex_key#44){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff888079c6b498 (&sb->s_type->i_mutex_key#44){+.+.}-{3:3}, at: vfs_setxattr+0x145/0x2f0 fs/xattr.c:321 #2: ffff888079c6b1b8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x410/0x11f0 fs/ocfs2/xattr.c:3583 stack backtrace: CPU: 1 PID: 16518 Comm: syz.2.2533 Not tainted 6.6.101-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_reserve_suballoc_bits+0x165/0x4360 fs/ocfs2/suballoc.c:782 ocfs2_reserve_new_metadata_blocks+0x404/0x940 fs/ocfs2/suballoc.c:978 ocfs2_init_xattr_set_ctxt+0x2f8/0x6e0 fs/ocfs2/xattr.c:3277 ocfs2_xattr_set+0xb6d/0x11f0 fs/ocfs2/xattr.c:3634 __vfs_setxattr+0x431/0x470 fs/xattr.c:201 __vfs_setxattr_noperm+0x12d/0x5e0 fs/xattr.c:235 vfs_setxattr+0x16c/0x2f0 fs/xattr.c:322 do_setxattr fs/xattr.c:630 [inline] __do_sys_fsetxattr fs/xattr.c:711 [inline] __se_sys_fsetxattr+0x426/0x4b0 fs/xattr.c:687 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f0d4158ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0d4235a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000be RAX: ffffffffffffffda RBX: 00007f0d417b5fa0 RCX: 00007f0d4158ebe9 RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000000000000004 RBP: 00007f0d41611e19 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0d417b6038 R14: 00007f0d417b5fa0 R15: 00007ffdd8b2e948