syzbot

loop0: detected capacity change from 0 to 32768
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.0.7364/29506 is trying to acquire lock:
ffff88806a9deba0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
ffff88806a9deba0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xba7/0x13e0 fs/ocfs2/xattr.c:3653

but task is already holding lock:
ffff88806a9df6e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0 fs/ocfs2/xattr.c:3614

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568
       ocfs2_init_acl+0x2fd/0x7e0 fs/ocfs2/acl.c:367
       ocfs2_mknod+0x1679/0x2260 fs/ocfs2/namei.c:414
       ocfs2_mkdir+0x181/0x460 fs/ocfs2/namei.c:660
       vfs_mkdir+0x413/0x630 fs/namei.c:5261
       filename_mkdirat+0x285/0x510 fs/namei.c:5294
       __do_sys_mkdirat fs/namei.c:5315 [inline]
       __se_sys_mkdirat+0x35/0x150 fs/namei.c:5312
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0 kernel/locking/rwsem.c:1568
       ocfs2_start_trans+0x3ab/0x700 fs/ocfs2/journal.c:369
       ocfs2_mknod+0x1181/0x2260 fs/ocfs2/namei.c:365
       ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:677
       lookup_open fs/namei.c:4511 [inline]
       open_last_lookups fs/namei.c:4611 [inline]
       path_openat+0x1395/0x3860 fs/namei.c:4855
       do_file_open+0x23e/0x4a0 fs/namei.c:4887
       do_sys_openat2+0x113/0x200 fs/open.c:1364
       do_sys_open fs/open.c:1370 [inline]
       __do_sys_openat fs/open.c:1386 [inline]
       __se_sys_openat fs/open.c:1381 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1381
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#3){.+.+}-{0:0}:
       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+0x2ac/0x700 fs/ocfs2/journal.c:367
       ocfs2_remove_btree_range+0x84c/0x1610 fs/ocfs2/alloc.c:5769
       ocfs2_commit_truncate+0xbb8/0x2310 fs/ocfs2/alloc.c:7383
       ocfs2_truncate_for_delete fs/ocfs2/inode.c:701 [inline]
       ocfs2_wipe_inode fs/ocfs2/inode.c:868 [inline]
       ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
       ocfs2_evict_inode+0x1023/0x43b0 fs/ocfs2/inode.c:1299
       evict+0x61e/0xb10 fs/inode.c:841
       ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407
       __dentry_kill+0x1a2/0x690 fs/dcache.c:718
       finish_dput+0xc9/0x480 fs/dcache.c:927
       end_renaming fs/namei.c:4124 [inline]
       filename_renameat2+0x61e/0x9c0 fs/namei.c:6174
       __do_sys_rename fs/namei.c:6216 [inline]
       __se_sys_rename+0x55/0x2c0 fs/namei.c:6212
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 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 kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
       lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
       down_write+0x96/0x200 kernel/locking/rwsem.c:1625
       inode_lock include/linux/fs.h:1029 [inline]
       ocfs2_xattr_set+0xba7/0x13e0 fs/ocfs2/xattr.c:3653
       __vfs_setxattr+0x43c/0x480 fs/xattr.c:218
       __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:252
       vfs_setxattr+0x163/0x360 fs/xattr.c:339
       do_setxattr fs/xattr.c:654 [inline]
       filename_setxattr+0x296/0x630 fs/xattr.c:682
       path_setxattrat+0x3eb/0x440 fs/xattr.c:726
       __do_sys_setxattr fs/xattr.c:760 [inline]
       __se_sys_setxattr fs/xattr.c:756 [inline]
       __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:756
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0x15f/0xf80 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.0.7364/29506:
 #0: ffff888042f00410 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
 #1: ffff88806a9df9a0 (&sb->s_type->i_mutex_key#29){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
 #1: ffff88806a9df9a0 (&sb->s_type->i_mutex_key#29){+.+.}-{4:4}, at: vfs_setxattr+0x13e/0x360 fs/xattr.c:338
 #2: ffff88806a9df6e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0 fs/ocfs2/xattr.c:3614

stack backtrace:
CPU: 0 UID: 0 PID: 29506 Comm: syz.0.7364 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043
 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 down_write+0x96/0x200 kernel/locking/rwsem.c:1625
 inode_lock include/linux/fs.h:1029 [inline]
 ocfs2_xattr_set+0xba7/0x13e0 fs/ocfs2/xattr.c:3653
 __vfs_setxattr+0x43c/0x480 fs/xattr.c:218
 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:252
 vfs_setxattr+0x163/0x360 fs/xattr.c:339
 do_setxattr fs/xattr.c:654 [inline]
 filename_setxattr+0x296/0x630 fs/xattr.c:682
 path_setxattrat+0x3eb/0x440 fs/xattr.c:726
 __do_sys_setxattr fs/xattr.c:760 [inline]
 __se_sys_setxattr fs/xattr.c:756 [inline]
 __x64_sys_setxattr+0xbc/0xe0 fs/xattr.c:756
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f597b59cdd9
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:00007f597c423028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f597b815fa0 RCX: 00007f597b59cdd9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000200000000040
RBP: 00007f597b632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f597b816038 R14: 00007f597b815fa0 R15: 00007ffc45dc4ce8
 </TASK>