loop0: detected capacity change from 0 to 32768
ocfs2: Slot 0 on device (7,0) was already allocated to this node!
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz-executor413/5951 is trying to acquire lock:
ffff888028ba6800 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_setattr+0x9eb/0x1d10 fs/ocfs2/file.c:1275

but task is already holding lock:
ffff88804c4e6c50 (&oi->ip_alloc_sem){++++}-{4:4}, at: ocfs2_setattr+0x9dc/0x1d10 fs/ocfs2/file.c:1274

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&oi->ip_alloc_sem){++++}-{4:4}:
       down_read+0x97/0x200 kernel/locking/rwsem.c:1574
       ocfs2_xattr_ibody_find+0x135/0x8f0 fs/ocfs2/xattr.c:2927
       ocfs2_xattr_set_handle+0x3f2/0x7f0 fs/ocfs2/xattr.c:3750
       ocfs2_init_security_set+0xbd/0xe0 fs/ocfs2/xattr.c:7574
       ocfs2_mknod+0x13c8/0x21a0 fs/ocfs2/namei.c:423
       ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:678
       lookup_open+0xc17/0x1a60 fs/namei.c:4567
       open_last_lookups fs/namei.c:4767 [inline]
       path_openat+0x67c/0x1d60 fs/namei.c:4997
       do_file_open+0x23e/0x4a0 fs/namei.c:5029
       do_sys_openat2+0x115/0x200 fs/open.c:1417
       do_sys_open fs/open.c:1423 [inline]
       __do_sys_openat fs/open.c:1439 [inline]
       __se_sys_openat fs/open.c:1434 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1434
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x97/0x200 kernel/locking/rwsem.c:1574
       ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369
       ocfs2_mknod+0xeed/0x21a0 fs/ocfs2/namei.c:365
       ocfs2_create+0x195/0x460 fs/ocfs2/namei.c:678
       lookup_open+0xc17/0x1a60 fs/namei.c:4567
       open_last_lookups fs/namei.c:4767 [inline]
       path_openat+0x67c/0x1d60 fs/namei.c:4997
       do_file_open+0x23e/0x4a0 fs/namei.c:5029
       do_sys_openat2+0x115/0x200 fs/open.c:1417
       do_sys_open fs/open.c:1423 [inline]
       __do_sys_openat fs/open.c:1439 [inline]
       __se_sys_openat fs/open.c:1434 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1434
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (sb_internal#2){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3209 [inline]
       check_prevs_add kernel/locking/lockdep.c:3328 [inline]
       validate_chain kernel/locking/lockdep.c:3952 [inline]
       __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
       lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
       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_setattr+0x9eb/0x1d10 fs/ocfs2/file.c:1275
       notify_change+0xbb8/0xec0 fs/attr.c:556
       chmod_common+0x262/0x480 fs/open.c:686
       vfs_fchmod fs/open.c:703 [inline]
       __do_sys_fchmod fs/open.c:713 [inline]
       __se_sys_fchmod fs/open.c:706 [inline]
       __x64_sys_fchmod+0xf5/0x160 fs/open.c:706
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  sb_internal#2 --> &journal->j_trans_barrier --> &oi->ip_alloc_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_alloc_sem);
                               lock(&journal->j_trans_barrier);
                               lock(&oi->ip_alloc_sem);
  rlock(sb_internal#2);

 *** DEADLOCK ***

locks held by syz-executor413/5951: 3, last CPU#0:
 #0: ffff888028ba6510 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
 #1: ffff88804c4e7000 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:1029 [inline]
 #1: ffff88804c4e7000 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: chmod_common+0x186/0x480 fs/open.c:678
 #2: ffff88804c4e6c50 (&oi->ip_alloc_sem){++++}-{4:4}, at: ocfs2_setattr+0x9dc/0x1d10 fs/ocfs2/file.c:1274

stack backtrace:
CPU: 0 UID: 0 PID: 5951 Comm: syz-executor413 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087
 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219
 check_prev_add kernel/locking/lockdep.c:3209 [inline]
 check_prevs_add kernel/locking/lockdep.c:3328 [inline]
 validate_chain kernel/locking/lockdep.c:3952 [inline]
 __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 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_setattr+0x9eb/0x1d10 fs/ocfs2/file.c:1275
 notify_change+0xbb8/0xec0 fs/attr.c:556
 chmod_common+0x262/0x480 fs/open.c:686
 vfs_fchmod fs/open.c:703 [inline]
 __do_sys_fchmod fs/open.c:713 [inline]
 __se_sys_fchmod fs/open.c:706 [inline]
 __x64_sys_fchmod+0xf5/0x160 fs/open.c:706
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58660bbfe7
Code: 00 66 90 48 83 ec 10 48 63 ff 45 31 c9 45 31 c0 6a 03 31 c9 31 d2 31 f6 e8 f6 07 02 00 48 83 c4 18 c3 90 b8 5b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe44efe058 EFLAGS: 00000202 ORIG_RAX: 000000000000005b
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f58660bbfe7
RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe44efe178
R13: 0000000000000002 R14: 00007f586613dc60 R1