ocfs2: Slot 0 on device (7,7) was already allocated to this node!
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 Not tainted
------------------------------------------------------
syz.7.1527/24664 is trying to acquire lock:
ffff88806b2d5c18 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_get+0xf4/0x260 fs/ocfs2/xattr.c:1575

but task is already holding lock:
ffff88801254e118 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&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_block_group_alloc fs/ocfs2/suballoc.c:801 [inline]
       ocfs2_reserve_suballoc_bits+0x7b7/0x4850 fs/ocfs2/suballoc.c:950
       ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1100
       ocfs2_mknod+0xe5f/0x21a0 fs/ocfs2/namei.c:351
       ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:662
       vfs_mkdir+0x408/0x620 fs/namei.c:5439
       filename_mkdirat+0x289/0x520 fs/namei.c:5472
       __do_sys_mkdirat fs/namei.c:5493 [inline]
       __se_sys_mkdirat+0x35/0x150 fs/namei.c:5490
       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

-> #2 (sb_internal#3){.+.+}-{0:0}:
       __lock_release kernel/locking/lockdep.c:5627 [inline]
       lock_release+0x1a3/0x3c0 kernel/locking/lockdep.c:5964
       up_write+0x1f/0x190 kernel/locking/rwsem.c:1687
       inode_unlock include/linux/fs.h:1034 [inline]
       ocfs2_free_ac_resource fs/ocfs2/suballoc.c:131 [inline]
       ocfs2_free_alloc_context+0x97/0x1a0 fs/ocfs2/suballoc.c:145
       ocfs2_write_begin_nolock+0x4164/0x41f0 fs/ocfs2/aops.c:1805
       ocfs2_dio_wr_get_block+0xbab/0x17c0 fs/ocfs2/aops.c:2215
       get_more_blocks fs/direct-io.c:644 [inline]
       do_direct_IO fs/direct-io.c:932 [inline]
       __blockdev_direct_IO+0x1965/0x33d0 fs/direct-io.c:1236
       ocfs2_direct_IO+0x24b/0x2c0 fs/ocfs2/aops.c:2460
       generic_file_direct_write+0x1d1/0x3f0 mm/filemap.c:4308
       __generic_file_write_iter+0x120/0x240 mm/filemap.c:4477
       ocfs2_file_write_iter+0x1709/0x1f20 fs/ocfs2/file.c:2481
       iter_file_splice_write+0xa36/0x1240 fs/splice.c:736
       do_splice_from fs/splice.c:936 [inline]
       direct_splice_actor+0x104/0x160 fs/splice.c:1159
       splice_direct_to_actor+0x586/0xcc0 fs/splice.c:1103
       do_splice_direct_actor fs/splice.c:1202 [inline]
       do_splice_direct+0x19b/0x2a0 fs/splice.c:1228
       do_sendfile+0x540/0x7e0 fs/read_write.c:1371
       __do_sys_sendfile64 fs/read_write.c:1432 [inline]
       __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418
       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 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       down_write+0x3a/0x50 kernel/locking/rwsem.c:1631
       ocfs2_try_remove_refcount_tree+0xb6/0x360 fs/ocfs2/refcounttree.c:959
       ocfs2_truncate_file+0xe91/0x14b0 fs/ocfs2/file.c:527
       ocfs2_setattr+0x1641/0x1d10 fs/ocfs2/file.c:1224
       notify_change+0xbb8/0xec0 fs/attr.c:556
       do_truncate+0x1c2/0x250 fs/open.c:68
       handle_truncate fs/namei.c:4329 [inline]
       do_open fs/namei.c:4870 [inline]
       path_openat+0x15ba/0x1d60 fs/namei.c:5029
       do_file_open+0x23e/0x4a0 fs/namei.c:5058
       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 (&oi->ip_xattr_sem){++++}-{4:4}:
       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
       down_read+0x97/0x200 kernel/locking/rwsem.c:1574
       ocfs2_xattr_get+0xf4/0x260 fs/ocfs2/xattr.c:1575
       __vfs_getxattr+0x412/0x440 fs/xattr.c:446
       smk_fetch+0xb4/0x140 security/smack/smack_lsm.c:298
       smack_d_instantiate+0x757/0x990 security/smack/smack_lsm.c:3679
       security_d_instantiate+0x106/0x1d0 security/security.c:3703
       d_instantiate+0x54/0xb0 fs/dcache.c:2182
       ocfs2_mknod+0x199c/0x21a0 fs/ocfs2/namei.c:454
       ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:662
       vfs_mkdir+0x408/0x620 fs/namei.c:5439
       filename_mkdirat+0x289/0x520 fs/namei.c:5472
       __do_sys_mkdirat fs/namei.c:5493 [inline]
       __se_sys_mkdirat+0x35/0x150 fs/namei.c:5490
       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:
  &oi->ip_xattr_sem --> sb_internal#3 --> &journal->j_trans_barrier

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&journal->j_trans_barrier);
                               lock(sb_internal#3);
                               lock(&journal->j_trans_barrier);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

locks held by syz.7.1527/24664: 8, last CPU#0:
 #0: ffff888064a9e510 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:527
 #1: ffff88806ae31c40 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
 #1: ffff88806ae31c40 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2947 [inline]
 #1: ffff88806ae31c40 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2971 [inline]
 #1: ffff88806ae31c40 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:5121
 #2: ffff88806b27bdc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #2: ffff88806b27bdc0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x170/0x4850 fs/ocfs2/suballoc.c:904
 #3: ffff88806bf3ce80 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #3: ffff88806bf3ce80 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x170/0x4850 fs/ocfs2/suballoc.c:904
 #4: ffff88806b278b80 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #4: ffff88806b278b80 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x11f/0x2680 fs/ocfs2/localalloc.c:636
 #5: ffff888064a9e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xeed/0x21a0 fs/ocfs2/namei.c:365
 #6: ffff88801254e118 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369
 #7: ffff888037c70bb0 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444

stack backtrace:
CPU: 0 UID: 0 PID: 24664 Comm: syz.7.1527 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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
 down_read+0x97/0x200 kernel/locking/rwsem.c:1574
 ocfs2_xattr_get+0xf4/0x260 fs/ocfs2/xattr.c:1575
 __vfs_getxattr+0x412/0x440 fs/xattr.c:446
 smk_fetch+0xb4/0x140 security/smack/smack_lsm.c:298
 smack_d_instantiate+0x757/0x990 security/smack/smack_lsm.c:3679
 security_d_instantiate+0x106/0x1d0 security/security.c:3703
 d_instantiate+0x54/0xb0 fs/dcache.c:2182
 ocfs2_mknod+0x199c/0x21a0 fs/ocfs2/namei.c:454
 ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:662
 vfs_mkdir+0x408/0x620 fs/namei.c:5439
 filename_mkdirat+0x289/0x520 fs/namei.c:5472
 __do_sys_mkdirat fs/namei.c:5493 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5490
 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: 0033:0x7f8b9383d147
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f8b91a95e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f8b91a95ee0 RCX: 00007f8b9383d147
RDX: 00000000000001ff RSI: 0000200000000680 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000680
R13: 00007f8b91a95ea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>