KASAN: null-ptr-deref Read in do_journal_end (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 97e9c8eb4bb1 Merge tag 'perf-tools-fixes-for-v5.17-2022-03..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11cc676d700000
kernel config: https://syzkaller.appspot.com/x/.config?x=70f75a89c7a0e6bc
dashboard link: https://syzkaller.appspot.com/bug?extid=92af49b0f6845b22c64f
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
CC: [ja...@suse.cz linux-...@vger.kernel.org ne...@suse.de paskr...@gmail.com reiserf...@vger.kernel.org tian...@hisilicon.com]

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+92af49...@syzkaller.appspotmail.com

==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:71 [inline]
BUG: KASAN: null-ptr-deref in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
BUG: KASAN: null-ptr-deref in set_buffer_uptodate include/linux/buffer_head.h:120 [inline]
BUG: KASAN: null-ptr-deref in do_journal_end+0x135f/0x4b30 fs/reiserfs/journal.c:4080
Read of size 8 at addr 0000000000000000 by task syz-executor.0/5830

CPU: 0 PID: 5830 Comm: syz-executor.0 Not tainted 5.17.0-rc8-syzkaller-00072-g97e9c8eb4bb1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
__kasan_report mm/kasan/report.c:446 [inline]
kasan_report.cold+0x66/0xdf mm/kasan/report.c:459
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:71 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
set_buffer_uptodate include/linux/buffer_head.h:120 [inline]
do_journal_end+0x135f/0x4b30 fs/reiserfs/journal.c:4080
reiserfs_sync_fs+0xf8/0x120 fs/reiserfs/super.c:78
sync_filesystem.part.0+0x75/0x1d0 fs/sync.c:56
sync_filesystem+0x8b/0xc0 fs/sync.c:43
generic_shutdown_super+0x70/0x400 fs/super.c:445
kill_block_super+0x97/0xf0 fs/super.c:1394
deactivate_locked_super+0x94/0x160 fs/super.c:332
deactivate_super+0xad/0xd0 fs/super.c:363
cleanup_mnt+0x3a2/0x540 fs/namespace.c:1173
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
exit_to_user_mode_prepare+0x27e/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f70f78dd4b7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd338b8a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f70f78dd4b7
RDX: 00007fffd338b97b RSI: 000000000000000a RDI: 00007fffd338b970
RBP: 00007fffd338b970 R08: 00000000ffffffff R09: 00007fffd338b740
R10: 00005555568bc8b3 R11: 0000000000000246 R12: 00007f70f79351ea
R13: 00007fffd338ca30 R14: 00005555568bc810 R15: 00007fffd338ca70
</TASK>
==================================================================


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[syzbot]

Sending this report upstream.