ocfs2: Mounting device (7,1) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.6520/19327 is trying to acquire lock: ffff8880509c2378 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_init_acl+0x2fb/0x720 fs/ocfs2/acl.c:365 but task is already holding lock: ffff888055a02990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f29/0x2150 fs/jbd2/transaction.c:463 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (jbd2_handle){++++}-{0:0}: jbd2_journal_lock_updates+0xa7/0x380 fs/jbd2/transaction.c:880 __ocfs2_flush_truncate_log+0x2cd/0x11d0 fs/ocfs2/alloc.c:6030 ocfs2_flush_truncate_log+0x4b/0x60 fs/ocfs2/alloc.c:6077 ocfs2_sync_fs+0x113/0x310 fs/ocfs2/super.c:402 sync_filesystem+0x1be/0x220 fs/sync.c:66 generic_shutdown_super+0x6b/0x340 fs/super.c:474 kill_block_super+0x7c/0xe0 fs/super.c:1470 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182 task_work_run+0x1ca/0x250 kernel/task_work.c:203 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:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}: down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:758 [inline] ocfs2_xattr_set+0xad6/0x11e0 fs/ocfs2/xattr.c:3626 ocfs2_set_acl+0x4e1/0x590 fs/ocfs2/acl.c:254 ocfs2_iop_set_acl+0x16f/0x270 fs/ocfs2/acl.c:285 set_posix_acl fs/posix_acl.c:1160 [inline] posix_acl_xattr_set+0x387/0x3f0 fs/posix_acl.c:1189 __vfs_setxattr+0x3e0/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216 vfs_setxattr+0x168/0x2f0 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x2b2/0x2d0 fs/xattr.c:617 path_setxattr+0x142/0x280 fs/xattr.c:636 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&oi->ip_xattr_sem){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x2fb/0x720 fs/ocfs2/acl.c:365 ocfs2_mknod+0x1463/0x2350 fs/ocfs2/namei.c:410 ocfs2_create+0x1b6/0x4a0 fs/ocfs2/namei.c:674 vfs_create+0x2db/0x460 fs/namei.c:3184 do_mknodat+0x399/0x4c0 fs/namei.c:4035 __do_sys_mknod fs/namei.c:4068 [inline] __se_sys_mknod fs/namei.c:4066 [inline] __x64_sys_mknod+0x8a/0xa0 fs/namei.c:4066 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2 --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(jbd2_handle); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2); lock(jbd2_handle); lock(&oi->ip_xattr_sem); *** DEADLOCK *** 8 locks held by syz.1.6520/19327: #0: ffff888020bda460 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:393 #1: ffff8880509c2648 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:793 [inline] #1: ffff8880509c2648 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: filename_create+0x1f2/0x450 fs/namei.c:3876 #2: ffff888054f85f48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #2: ffff888054f85f48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x162/0x4630 fs/ocfs2/suballoc.c:782 #3: ffff8880509c5f48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #3: ffff8880509c5f48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x162/0x4630 fs/ocfs2/suballoc.c:782 #4: ffff888054f83488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #4: ffff888054f83488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0x122/0x2670 fs/ocfs2/localalloc.c:635 #5: ffff888020bda650 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xe6a/0x2350 fs/ocfs2/namei.c:361 #6: ffff8880648954e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x366/0x6c0 fs/ocfs2/journal.c:374 #7: ffff888055a02990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f29/0x2150 fs/jbd2/transaction.c:463 stack backtrace: CPU: 1 PID: 19327 Comm: syz.1.6520 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3090 [inline] check_prevs_add kernel/locking/lockdep.c:3209 [inline] validate_chain kernel/locking/lockdep.c:3825 [inline] __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662 down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520 ocfs2_init_acl+0x2fb/0x720 fs/ocfs2/acl.c:365 ocfs2_mknod+0x1463/0x2350 fs/ocfs2/namei.c:410 ocfs2_create+0x1b6/0x4a0 fs/ocfs2/namei.c:674 vfs_create+0x2db/0x460 fs/namei.c:3184 do_mknodat+0x399/0x4c0 fs/namei.c:4035 __do_sys_mknod fs/namei.c:4068 [inline] __se_sys_mknod fs/namei.c:4066 [inline] __x64_sys_mknod+0x8a/0xa0 fs/namei.c:4066 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc73ad8ebe9 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:00007fc73bcab038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 00007fc73afb5fa0 RCX: 00007fc73ad8ebe9 RDX: 0000000000000703 RSI: 0000000000000800 RDI: 0000200000000000 RBP: 00007fc73ae11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc73afb6038 R14: 00007fc73afb5fa0 R15: 00007ffd01082238