loop0: detected capacity change from 0 to 32768
JBD2: Ignoring recovery information on journal
JBD2: Journal too short (blocks 65794-16384).
JBD2: journal reset failed
(syz.0.0,5105,0):ocfs2_journal_load:1144 ERROR: Failed to load journal!
(syz.0.0,5105,0):ocfs2_check_volume:2425 ERROR: ocfs2 journal load failed! -22
(syz.0.0,5105,0):ocfs2_check_volume:2481 ERROR: status = -22
(syz.0.0,5105,0):ocfs2_mount_volume:1821 ERROR: status = -22
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: null-ptr-deref in test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline]
BUG: KASAN: null-ptr-deref in trylock_buffer include/linux/buffer_head.h:420 [inline]
BUG: KASAN: null-ptr-deref in lock_buffer include/linux/buffer_head.h:426 [inline]
BUG: KASAN: null-ptr-deref in jbd2_journal_update_sb_log_tail+0x19b/0x360 fs/jbd2/journal.c:1889
Write of size 8 at addr 0000000000000000 by task syz.0.0/5105

CPU: 0 UID: 0 PID: 5105 Comm: syz.0.0 Not tainted 6.11.0-rc3-syzkaller-00338-gc3f2d783a459 #0
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 lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_report+0xe8/0x550 mm/kasan/report.c:491
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 test_and_set_bit_lock include/asm-generic/bitops/instrumented-lock.h:57 [inline]
 trylock_buffer include/linux/buffer_head.h:420 [inline]
 lock_buffer include/linux/buffer_head.h:426 [inline]
 jbd2_journal_update_sb_log_tail+0x19b/0x360 fs/jbd2/journal.c:1889
 __jbd2_update_log_tail+0x48/0x3f0 fs/jbd2/journal.c:1079
 jbd2_cleanup_journal_tail+0x230/0x2d0 fs/jbd2/checkpoint.c:334
 jbd2_journal_flush+0x290/0xc10 fs/jbd2/journal.c:2479
 ocfs2_journal_shutdown+0x443/0xbe0 fs/ocfs2/journal.c:1081
 ocfs2_mount_volume+0x169f/0x1940 fs/ocfs2/super.c:1842
 ocfs2_fill_super+0x483b/0x5880 fs/ocfs2/super.c:1084
 mount_bdev+0x20a/0x2d0 fs/super.c:1679
 legacy_get_tree+0xee/0x190 fs/fs_context.c:662
 vfs_get_tree+0x90/0x2a0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3472
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3997
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f105657b0ba
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007f105742ce68 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f105742cef0 RCX: 00007f105657b0ba
RDX: 0000000020004480 RSI: 00000000200044c0 RDI: 00007f105742ceb0
RBP: 0000000020004480 R08: 00007f105742cef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200044c0
R13: 00007f105742ceb0 R14: 0000000000004476 R15: 0000000020001200
 </TASK>
==================================================================