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BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:72 [inline]
BUG: KASAN: null-ptr-deref in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: null-ptr-deref in set_buffer_uptodate include/linux/buffer_head.h:148 [inline]
BUG: KASAN: null-ptr-deref in do_journal_end+0x106c/0x4790 fs/reiserfs/journal.c:4083
Read of size 8 at addr 0000000000000000 by task syz-executor/5269

CPU: 1 PID: 5269 Comm: syz-executor Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 kasan_report+0x10b/0x140 mm/kasan/report.c:531
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x27b/0x290 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 set_buffer_uptodate include/linux/buffer_head.h:148 [inline]
 do_journal_end+0x106c/0x4790 fs/reiserfs/journal.c:4083
 reiserfs_sync_fs+0xcc/0x150 fs/reiserfs/super.c:78
 sync_filesystem+0xe6/0x220 fs/sync.c:56
 generic_shutdown_super+0x6b/0x340 fs/super.c:474
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1182
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x936/0x2400 kernel/exit.c:871
 do_group_exit+0x217/0x2d0 kernel/exit.c:1021
 __do_sys_exit_group kernel/exit.c:1032 [inline]
 __se_sys_exit_group kernel/exit.c:1030 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1030
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6f19b8e929
Code: Unable to access opcode bytes at 0x7f6f19b8e8ff.
RSP: 002b:00007ffc7d1890b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f6f19c10997 RCX: 00007f6f19b8e929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000010 R08: 00007ffc7d186e56 R09: 00007ffc7d18a370
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc7d18a370
R13: 00007f6f19c10925 R14: 000055558314a4a8 R15: 00007ffc7d18b440
 </TASK>
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