jbd2_journal_bmap: journal block not found at offset 32 on loop4-75
JBD2: bad block at offset 32
ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.531/8143 is trying to acquire lock:
ffff8881ac426c78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2fd/0x7e0

but task is already holding lock:
ffff8881b8266ce8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_shutdown_local_alloc+0x1fb/0xab0
       ocfs2_dismount_volume+0x1ec/0x8c0
       generic_shutdown_super+0x135/0x2c0
       kill_block_super+0x44/0x90
       deactivate_locked_super+0xbc/0x130
       cleanup_mnt+0x437/0x4d0
       task_work_run+0x1d9/0x270
       exit_to_user_mode_loop+0xed/0x480
       do_syscall_64+0x2b7/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#2){.+.+}-{0:0}:
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_xattr_set+0xebb/0x13e0
       __vfs_removexattr+0x431/0x470
       __vfs_removexattr_locked+0x1e8/0x230
       vfs_removexattr+0x80/0x1b0
       ovl_fill_super+0x4c39/0x5e60
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2a0
       do_new_mount+0x329/0xa50
       __se_sys_mount+0x31d/0x420
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x330
       down_read+0x47/0x2e0
       ocfs2_init_acl+0x2fd/0x7e0
       ocfs2_mknod+0x1423/0x2210
       ocfs2_create+0x195/0x440
       path_openat+0x18dd/0x3e20
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x220
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xe2/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

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

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

8 locks held by syz.4.531/8143:
 #0: ffff8881b7b48420 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881ac426f40 (&type->i_mutex_dir_key#24){++++}-{4:4}, at: path_openat+0xb53/0x3e20
 #2: ffff8881b87fa6c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790
 #3: ffff8881ac421840 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16f/0x4790
 #4: ffff8881b87fd240 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x11f/0x2610
 #5: ffff8881b7b48610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_mknod+0xf31/0x2210
 #6: ffff8881b8266ce8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3ab/0x700
 #7: ffff88816f8ca950 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x2054/0x2290

stack backtrace:
CPU: 1 UID: 0 PID: 8143 Comm: syz.4.531 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_circular_bug+0x2e1/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x15a5/0x2cf0
 lock_acquire+0x106/0x330
 down_read+0x47/0x2e0
 ocfs2_init_acl+0x2fd/0x7e0
 ocfs2_mknod+0x1423/0x2210
 ocfs2_create+0x195/0x440
 path_openat+0x18dd/0x3e20
 do_filp_open+0x22d/0x490
 do_sys_openat2+0x12f/0x220
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feb22f9acb9
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:00007feb23e13028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007feb23216090 RCX: 00007feb22f9acb9
RDX: 0000000000143041 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007feb23008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007feb23216128 R14: 00007feb23216090 R15: 00007ffdd61d8998
 </TASK>
OCFS2: ERROR (device loop4): int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *, handle_t *, u32, u32, struct ocfs2_suballoc_result *): Chain allocator dinode 71 has 16777215 used bits but only 1024 total
On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted.
OCFS2: File system is now read-only.
(syz.4.531,8143,1):ocfs2_claim_suballoc_bits:2074 ERROR: status = -30
(syz.4.531,8143,1):__ocfs2_claim_clusters:2449 ERROR: status = -30
(syz.4.531,8143,1):__ocfs2_claim_clusters:2457 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_local_alloc_new_window:1199 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_local_alloc_new_window:1224 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_local_alloc_slide_window:1298 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_local_alloc_slide_window:1317 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_reserve_local_alloc_bits:672 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_reserve_local_alloc_bits:710 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_reserve_clusters_with_limit:1173 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_reserve_clusters_with_limit:1222 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_lock_allocators:2786 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_write_begin_nolock:1723 ERROR: status = -30
(syz.4.531,8143,1):ocfs2_write_begin:1887 ERROR: status = -30
