syzbot

loop1: detected capacity change from 0 to 32768
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.1.3479/22020 is trying to acquire lock:
ffff888036963ff8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_calc_xattr_init+0x20a/0xd80 fs/ocfs2/xattr.c:627

but task is already holding lock:
ffff888036b489c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
ffff888036b489c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
       down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:980 [inline]
       ocfs2_remove_inode fs/ocfs2/inode.c:731 [inline]
       ocfs2_wipe_inode fs/ocfs2/inode.c:894 [inline]
       ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline]
       ocfs2_evict_inode+0x153d/0x4100 fs/ocfs2/inode.c:1295
       evict+0x504/0x9c0 fs/inode.c:810
       d_delete_notify include/linux/fsnotify.h:377 [inline]
       vfs_rmdir+0x3ec/0x520 fs/namei.c:4561
       do_rmdir+0x25f/0x550 fs/namei.c:4603
       __do_sys_unlinkat fs/namei.c:4777 [inline]
       __se_sys_unlinkat fs/namei.c:4771 [inline]
       __x64_sys_unlinkat+0xc2/0xf0 fs/namei.c:4771
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
       down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:980 [inline]
       ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2730
       ocfs2_dio_end_io_write fs/ocfs2/aops.c:2306 [inline]
       ocfs2_dio_end_io+0x479/0x10f0 fs/ocfs2/aops.c:2404
       dio_complete+0x25b/0x790 fs/direct-io.c:281
       __blockdev_direct_IO+0x2e63/0x3490 fs/direct-io.c:1303
       ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2441
       generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4176
       __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4345
       ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469
       iter_file_splice_write+0x975/0x10e0 fs/splice.c:738
       do_splice_from fs/splice.c:938 [inline]
       direct_splice_actor+0x101/0x160 fs/splice.c:1161
       splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105
       do_splice_direct_actor fs/splice.c:1204 [inline]
       do_splice_direct+0x181/0x270 fs/splice.c:1230
       do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
       __do_sys_sendfile64 fs/read_write.c:1431 [inline]
       __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
       down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590
       ocfs2_try_remove_refcount_tree+0xb6/0x320 fs/ocfs2/refcounttree.c:932
       ocfs2_truncate_file+0xda0/0x1420 fs/ocfs2/file.c:521
       ocfs2_setattr+0x1520/0x1b40 fs/ocfs2/file.c:1212
       notify_change+0xc1a/0xf40 fs/attr.c:546
       do_truncate+0x1a4/0x220 fs/open.c:68
       handle_truncate fs/namei.c:3596 [inline]
       do_open fs/namei.c:3979 [inline]
       path_openat+0x306c/0x3830 fs/namei.c:4134
       do_filp_open+0x1fa/0x410 fs/namei.c:4161
       do_sys_openat2+0x121/0x1c0 fs/open.c:1437
       do_sys_open fs/open.c:1452 [inline]
       __do_sys_openat fs/open.c:1468 [inline]
       __se_sys_openat fs/open.c:1463 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1463
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908
       __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237
       lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537
       ocfs2_calc_xattr_init+0x20a/0xd80 fs/ocfs2/xattr.c:627
       ocfs2_mknod+0xc92/0x2050 fs/ocfs2/namei.c:333
       ocfs2_mkdir+0x191/0x440 fs/ocfs2/namei.c:659
       vfs_mkdir+0x306/0x510 fs/namei.c:4453
       do_mkdirat+0x247/0x590 fs/namei.c:4486
       __do_sys_mkdirat fs/namei.c:4503 [inline]
       __se_sys_mkdirat fs/namei.c:4501 [inline]
       __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4501
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xfa/0xfa0 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:
  &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);
                               lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
                               lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

3 locks held by syz.1.3479/22020:
 #0: ffff888028dd8420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:508
 #1: ffff8880369642c0 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1025 [inline]
 #1: ffff8880369642c0 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: filename_create+0x1f8/0x3c0 fs/namei.c:4226
 #2: ffff888036b489c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
 #2: ffff888036b489c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788

stack backtrace:
CPU: 0 UID: 0 PID: 22020 Comm: syz.1.3479 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043
 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908
 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1537
 ocfs2_calc_xattr_init+0x20a/0xd80 fs/ocfs2/xattr.c:627
 ocfs2_mknod+0xc92/0x2050 fs/ocfs2/namei.c:333
 ocfs2_mkdir+0x191/0x440 fs/ocfs2/namei.c:659
 vfs_mkdir+0x306/0x510 fs/namei.c:4453
 do_mkdirat+0x247/0x590 fs/namei.c:4486
 __do_sys_mkdirat fs/namei.c:4503 [inline]
 __se_sys_mkdirat fs/namei.c:4501 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4501
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa314b8d617
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007fa315a2de68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fa315a2def0 RCX: 00007fa314b8d617
RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000200000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000040
R13: 00007fa315a2deb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>