syzbot

loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode.
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5355 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 fail_dump lib/fault-inject.c:73 [inline]
 should_fail_ex+0x414/0x560 lib/fault-inject.c:174
 should_failslab+0xa8/0x100 mm/failslab.c:46
 slab_pre_alloc_hook mm/slub.c:4144 [inline]
 slab_alloc_node mm/slub.c:4220 [inline]
 __do_kmalloc_node mm/slub.c:4375 [inline]
 __kmalloc_node_noprof+0xd1/0x4e0 mm/slub.c:4382
 kmalloc_array_node_noprof include/linux/slab.h:1020 [inline]
 alloc_slab_obj_exts+0x39/0xa0 mm/slub.c:2033
 __memcg_slab_post_alloc_hook+0x31e/0x7f0 mm/memcontrol.c:3174
 memcg_slab_post_alloc_hook mm/slub.c:2221 [inline]
 slab_post_alloc_hook mm/slub.c:4201 [inline]
 slab_alloc_node mm/slub.c:4240 [inline]
 __kmalloc_cache_noprof+0x2d2/0x3d0 mm/slub.c:4402
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 alloc_pipe_info+0xe9/0x4d0 fs/pipe.c:798
 splice_direct_to_actor+0xa5d/0xcc0 fs/splice.c:1049
 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/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f9b78eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7f9c556038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7f9b9d5fa0 RCX: 00007f7f9b78eba9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f7f9c556090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f7f9b9d6038 R14: 00007f7f9b9d5fa0 R15: 00007ffd194df9b8
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5355 at fs/jbd2/transaction.c:1553 jbd2_journal_dirty_metadata+0x8e6/0xc30 fs/jbd2/transaction.c:1553
Modules linked in:
CPU: 0 UID: 0 PID: 5355 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:jbd2_journal_dirty_metadata+0x8e6/0xc30 fs/jbd2/transaction.c:1553
Code: 8b 44 24 40 4d 89 f9 50 53 41 55 41 54 e8 72 19 9e fe 48 83 c4 20 90 0f 0b 90 bb ea ff ff ff e9 35 fe ff ff e8 5b 46 36 ff 90 <0f> 0b 90 bb e4 ff ff ff e9 22 fe ff ff 48 8b 44 24 30 48 83 c0 18
RSP: 0018:ffffc9000d536998 EFLAGS: 00010293
RAX: ffffffff828986b5 RBX: 1ffff110088e6891 RCX: ffff888032ff2440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001aa6d24 R12: ffff888032069428
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1100640d282
FS:  00007f7f9c5566c0(0000) GS:ffff88808d00a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055edff0e4168 CR3: 0000000042e9e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_journal_dirty+0x149/0x740 fs/ocfs2/journal.c:834
 ocfs2_alloc_dinode_update_counts fs/ocfs2/suballoc.c:1652 [inline]
 ocfs2_search_one_group fs/ocfs2/suballoc.c:1763 [inline]
 ocfs2_claim_suballoc_bits+0x151b/0x2450 fs/ocfs2/suballoc.c:1984
 __ocfs2_claim_clusters+0x303/0x8f0 fs/ocfs2/suballoc.c:2421
 ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3243 [inline]
 ocfs2_replace_cow+0x94b/0x1b90 fs/ocfs2/refcounttree.c:3346
 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3424 [inline]
 ocfs2_refcount_cow+0x779/0xc90 fs/ocfs2/refcounttree.c:3467
 ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2340 [inline]
 ocfs2_file_write_iter+0xe28/0x1d10 fs/ocfs2/file.c:2451
 iter_file_splice_write+0x975/0x10e0 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0xfe/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/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7f9b78eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7f9c556038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f7f9b9d5fa0 RCX: 00007f7f9b78eba9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f7f9c556090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000800000009 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f7f9b9d6038 R14: 00007f7f9b9d5fa0 R15: 00007ffd194df9b8
 </TASK>