REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 4029, free_space(entry_count) 2
REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 540. Fsck?
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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 buffer_locked include/linux/buffer_head.h:123 [inline]
BUG: KASAN: null-ptr-deref in fix_nodes+0x458/0xda60 fs/reiserfs/fix_node.c:2578
Read of size 8 at addr 0000000000000000 by task syz-executor.0/2532

CPU: 0 PID: 2532 Comm: syz-executor.0 Not tainted 6.1.69-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xf4/0x251 lib/dump_stack.c:106
 print_report+0xe6/0x4f0 mm/kasan/report.c:398
 kasan_report+0x136/0x160 mm/kasan/report.c:495
 kasan_check_range+0x27f/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]
 buffer_locked include/linux/buffer_head.h:123 [inline]
 fix_nodes+0x458/0xda60 fs/reiserfs/fix_node.c:2578
 reiserfs_cut_from_item+0x3f5/0x1e90 fs/reiserfs/stree.c:1742
 reiserfs_do_truncate+0x84e/0x1190 fs/reiserfs/stree.c:1973
 reiserfs_truncate_file+0x37b/0x970 fs/reiserfs/inode.c:2310
 reiserfs_setattr+0x7c8/0xe40 fs/reiserfs/inode.c:3395
 notify_change+0x937/0xc40 fs/attr.c:499
 do_truncate+0x1d6/0x2c0 fs/open.c:65
 handle_truncate fs/namei.c:3217 [inline]
 do_open fs/namei.c:3562 [inline]
 path_openat+0x1fd5/0x2410 fs/namei.c:3715
 do_filp_open+0x226/0x430 fs/namei.c:3742
 do_sys_openat2+0x10b/0x420 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_open fs/open.c:1342 [inline]
 __se_sys_open fs/open.c:1338 [inline]
 __x64_sys_open+0x1eb/0x240 fs/open.c:1338
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0x80 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f075247c959
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f07531d00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f075259c050 RCX: 00007f075247c959
RDX: 0000000000000000 RSI: 000000000014937e RDI: 0000000020000180
RBP: 00007f07524d8c88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f075259c050 R15: 00007ffcf34b4628
 </TASK>
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