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? ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:68 [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:124 [inline] BUG: KASAN: null-ptr-deref in fix_nodes+0x4b2/0x8ae0 fs/reiserfs/fix_node.c:2579 Read of size 8 at addr 0000000000000000 by task syz-executor256/11251 CPU: 1 PID: 11251 Comm: syz-executor256 Not tainted 6.7.0-rc6-syzkaller-00078-ga4aebe936554 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 kasan_report+0xda/0x110 mm/kasan/report.c:588 check_region_inline mm/kasan/generic.c:181 [inline] kasan_check_range+0xef/0x190 mm/kasan/generic.c:187 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] buffer_locked include/linux/buffer_head.h:124 [inline] fix_nodes+0x4b2/0x8ae0 fs/reiserfs/fix_node.c:2579 reiserfs_cut_from_item+0x26a/0x1a10 fs/reiserfs/stree.c:1740 reiserfs_do_truncate+0x672/0x10b0 fs/reiserfs/stree.c:1971 reiserfs_truncate_file+0x1bf/0x940 fs/reiserfs/inode.c:2302 reiserfs_setattr+0x9c3/0x12a0 fs/reiserfs/inode.c:3388 notify_change+0x742/0x11c0 fs/attr.c:499 do_truncate+0x15c/0x220 fs/open.c:66 handle_truncate fs/namei.c:3280 [inline] do_open fs/namei.c:3626 [inline] path_openat+0x2597/0x2c50 fs/namei.c:3779 do_filp_open+0x1de/0x430 fs/namei.c:3809 do_sys_openat2+0x176/0x1e0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_creat fs/open.c:1528 [inline] __se_sys_creat fs/open.c:1522 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1522 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fb36c4e9589 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 1c 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:00007fb36bc9f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fb36c5964a8 RCX: 00007fb36c4e9589 RDX: 00007fb36c4e9589 RSI: 0000000000000000 RDI: 0000000020000340 RBP: 00007fb36c5964a0 R08: 00007fb36bc9f6c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb36c5964ac R13: 0000000000000016 R14: 00007fff04bfe6c0 R15: 00007fff04bfe7a8 ==================================================================