syzbot

JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,7) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.7.1290/10386 is trying to acquire lock:
ffff888012be33a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
ffff888012be33a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xd4d/0x2bb0 fs/ocfs2/xattr.c:3666

but task is already holding lock:
ffff8880520cbee8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x429/0x2bb0 fs/ocfs2/xattr.c:3627

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_xattr_sem){++++}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574
       ocfs2_init_acl+0x35b/0x840 fs/ocfs2/acl.c:367
       ocfs2_mknod+0x173c/0x2770 fs/ocfs2/namei.c:414
       ocfs2_create+0xf4/0x430 fs/ocfs2/namei.c:677
       lookup_open fs/namei.c:4508 [inline]
       open_last_lookups fs/namei.c:4608 [inline]
       path_openat+0x341f/0x4280 fs/namei.c:4856
       do_file_open+0x20e/0x430 fs/namei.c:4888
       do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
       do_sys_open fs/open.c:1374 [inline]
       __do_sys_creat fs/open.c:1452 [inline]
       __se_sys_creat fs/open.c:1446 [inline]
       __x64_sys_creat+0xcc/0x120 fs/open.c:1446
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       down_read+0x99/0x4c0 kernel/locking/rwsem.c:1574
       ocfs2_start_trans+0x5cc/0x8f0 fs/ocfs2/journal.c:369
       ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5955 [inline]
       __ocfs2_flush_truncate_log+0x667/0x1180 fs/ocfs2/alloc.c:6071
       ocfs2_flush_truncate_log+0x4a/0x70 fs/ocfs2/alloc.c:6093
       ocfs2_sync_fs+0x1c6/0x3d0 fs/ocfs2/super.c:406
       sync_filesystem fs/sync.c:66 [inline]
       sync_filesystem+0x1d0/0x290 fs/sync.c:30
       ocfs2_reconfigure+0x119/0xed0 fs/ocfs2/super.c:616
       reconfigure_super+0x52d/0xb30 fs/super.c:1020
       do_remount fs/namespace.c:3407 [inline]
       path_mount+0x19fc/0x23d0 fs/namespace.c:4153
       do_mount fs/namespace.c:4174 [inline]
       __do_sys_mount fs/namespace.c:4390 [inline]
       __se_sys_mount fs/namespace.c:4367 [inline]
       __x64_sys_mount+0x293/0x310 fs/namespace.c:4367
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (sb_internal#5){.+.+}-{0:0}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
       percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
       __sb_start_write include/linux/fs/super.h:19 [inline]
       sb_start_intwrite include/linux/fs/super.h:177 [inline]
       ocfs2_start_trans+0x4bb/0x8f0 fs/ocfs2/journal.c:367
       ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5955 [inline]
       __ocfs2_flush_truncate_log+0x667/0x1180 fs/ocfs2/alloc.c:6071
       ocfs2_flush_truncate_log+0x4a/0x70 fs/ocfs2/alloc.c:6093
       ocfs2_sync_fs+0x1c6/0x3d0 fs/ocfs2/super.c:406
       sync_filesystem fs/sync.c:66 [inline]
       sync_filesystem+0x1d0/0x290 fs/sync.c:30
       ocfs2_reconfigure+0x119/0xed0 fs/ocfs2/super.c:616
       reconfigure_super+0x52d/0xb30 fs/super.c:1020
       do_remount fs/namespace.c:3407 [inline]
       path_mount+0x19fc/0x23d0 fs/namespace.c:4153
       do_mount fs/namespace.c:4174 [inline]
       __do_sys_mount fs/namespace.c:4390 [inline]
       __se_sys_mount fs/namespace.c:4367 [inline]
       __x64_sys_mount+0x293/0x310 fs/namespace.c:4367
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631
       inode_lock include/linux/fs.h:1024 [inline]
       __ocfs2_flush_truncate_log+0x495/0x1180 fs/ocfs2/alloc.c:6063
       ocfs2_flush_truncate_log+0x4a/0x70 fs/ocfs2/alloc.c:6093
       ocfs2_sync_fs+0x1c6/0x3d0 fs/ocfs2/super.c:406
       sync_filesystem fs/sync.c:66 [inline]
       sync_filesystem+0x1d0/0x290 fs/sync.c:30
       ocfs2_reconfigure+0x119/0xed0 fs/ocfs2/super.c:616
       reconfigure_super+0x52d/0xb30 fs/super.c:1020
       do_remount fs/namespace.c:3407 [inline]
       path_mount+0x19fc/0x23d0 fs/namespace.c:4153
       do_mount fs/namespace.c:4174 [inline]
       __do_sys_mount fs/namespace.c:4390 [inline]
       __se_sys_mount fs/namespace.c:4367 [inline]
       __x64_sys_mount+0x293/0x310 fs/namespace.c:4367
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}:
       check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
       down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631
       inode_lock include/linux/fs.h:1024 [inline]
       ocfs2_xattr_set+0xd4d/0x2bb0 fs/ocfs2/xattr.c:3666
       ocfs2_set_acl+0x469/0x550 fs/ocfs2/acl.c:255
       ocfs2_iop_set_acl+0x224/0x2d0 fs/ocfs2/acl.c:287
       set_posix_acl+0x263/0x320 fs/posix_acl.c:955
       vfs_set_acl+0x411/0x9e0 fs/posix_acl.c:1134
       do_set_acl+0xd9/0x1a0 fs/posix_acl.c:1279
       do_setxattr+0xeb/0x180 fs/xattr.c:659
       filename_setxattr+0x167/0x1d0 fs/xattr.c:690
       path_setxattrat+0x1ff/0x3b0 fs/xattr.c:734
       __do_sys_lsetxattr fs/xattr.c:775 [inline]
       __se_sys_lsetxattr fs/xattr.c:771 [inline]
       __x64_sys_lsetxattr+0xc9/0x140 fs/xattr.c:771
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE] --> &journal->j_trans_barrier --> &oi->ip_xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_xattr_sem);
                               lock(&journal->j_trans_barrier);
                               lock(&oi->ip_xattr_sem);
  lock(&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]);

 *** DEADLOCK ***

3 locks held by syz.7.1290/10386:
 #0: ffff888036466450 (sb_writers#23){.+.+}-{0:0}, at: filename_setxattr+0xbf/0x1d0 fs/xattr.c:688
 #1: ffff8880520cc1a0 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #1: ffff8880520cc1a0 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: vfs_set_acl+0x331/0x9e0 fs/posix_acl.c:1115
 #2: ffff8880520cbee8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x429/0x2bb0 fs/ocfs2/xattr.c:3627

stack backtrace:
CPU: 1 UID: 0 PID: 10386 Comm: syz.7.1290 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3165
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x136c/0x1a40 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825
 down_write+0x8b/0x1f0 kernel/locking/rwsem.c:1631
 inode_lock include/linux/fs.h:1024 [inline]
 ocfs2_xattr_set+0xd4d/0x2bb0 fs/ocfs2/xattr.c:3666
 ocfs2_set_acl+0x469/0x550 fs/ocfs2/acl.c:255
 ocfs2_iop_set_acl+0x224/0x2d0 fs/ocfs2/acl.c:287
 set_posix_acl+0x263/0x320 fs/posix_acl.c:955
 vfs_set_acl+0x411/0x9e0 fs/posix_acl.c:1134
 do_set_acl+0xd9/0x1a0 fs/posix_acl.c:1279
 do_setxattr+0xeb/0x180 fs/xattr.c:659
 filename_setxattr+0x167/0x1d0 fs/xattr.c:690
 path_setxattrat+0x1ff/0x3b0 fs/xattr.c:734
 __do_sys_lsetxattr fs/xattr.c:775 [inline]
 __se_sys_lsetxattr fs/xattr.c:771 [inline]
 __x64_sys_lsetxattr+0xc9/0x140 fs/xattr.c:771
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c6259ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5c634b3028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f5c62815fa0 RCX: 00007f5c6259ce59
RDX: 00002000000000c0 RSI: 0000200000000440 RDI: 0000200000000400
RBP: 00007f5c62632e6f R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000005c R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5c62816038 R14: 00007f5c62815fa0 R15: 00007fff3fe33eb8
 </TASK>