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BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: null-ptr-deref in _test_bit_acquire include/asm-generic/bitops/instrumented-non-atomic.h:153 [inline]
BUG: KASAN: null-ptr-deref in wait_on_bit_io include/linux/wait_bit.h:99 [inline]
BUG: KASAN: null-ptr-deref in __wait_on_buffer+0x33/0x90 fs/buffer.c:123
Read of size 8 at addr 0000000000000000 by task syz-executor.0/5527

CPU: 1 PID: 5527 Comm: syz-executor.0 Not tainted 6.4.0-rc2-syzkaller-00018-g4d6d4c7f541d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_report+0xe6/0x540 mm/kasan/report.c:465
 kasan_report+0x176/0x1b0 mm/kasan/report.c:572
 kasan_check_range+0x283/0x290 mm/kasan/generic.c:187
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit_acquire include/asm-generic/bitops/instrumented-non-atomic.h:153 [inline]
 wait_on_bit_io include/linux/wait_bit.h:99 [inline]
 __wait_on_buffer+0x33/0x90 fs/buffer.c:123
 flush_commit_list+0xd8a/0x1bf0 fs/reiserfs/journal.c:1072
 do_journal_end+0x3ca4/0x4770 fs/reiserfs/journal.c:4372
 journal_end_sync fs/reiserfs/journal.c:3535 [inline]
 __commit_trans_jl fs/reiserfs/journal.c:3877 [inline]
 reiserfs_commit_for_inode+0xa6d/0xbe0 fs/reiserfs/journal.c:3920
 reiserfs_get_blocks_direct_io+0x20d/0x2e0 fs/reiserfs/inode.c:546
 get_more_blocks fs/direct-io.c:637 [inline]
 do_direct_IO fs/direct-io.c:925 [inline]
 __blockdev_direct_IO+0x1ada/0x40e0 fs/direct-io.c:1237
 blockdev_direct_IO include/linux/fs.h:2808 [inline]
 reiserfs_direct_IO+0xef/0x210 fs/reiserfs/inode.c:3243
 generic_file_direct_write+0x208/0x460 mm/filemap.c:3847
 __generic_file_write_iter+0x1c8/0x400 mm/filemap.c:4007
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4083
 do_iter_write+0x7b1/0xcb0 fs/read_write.c:860
 iter_file_splice_write+0x843/0xfe0 fs/splice.c:795
 do_splice_from fs/splice.c:873 [inline]
 direct_splice_actor+0xe7/0x1c0 fs/splice.c:1039
 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:994
 do_splice_direct+0x283/0x3d0 fs/splice.c:1082
 do_sendfile+0x620/0xff0 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f197a68c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f197b4b6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f197a7ac050 RCX: 00007f197a68c169
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000007
RBP: 00007f197a6e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201004 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1b5fc93f R14: 00007f197b4b6300 R15: 0000000000022000
 </TASK>
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