REISERFS warning (device loop5): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 SD] (nlink == 1) not found (pos 2)
REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage.
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BUG: KASAN: use-after-free in strlen+0x54/0x70 lib/string.c:566
Read of size 1 at addr ffff0000f5dd3008 by task syz.5.3097/14041

CPU: 1 PID: 14041 Comm: syz.5.3097 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 __asan_report_load1_noabort+0x44/0x50 mm/kasan/report_generic.c:306
 strlen+0x54/0x70 lib/string.c:566
 set_de_name_and_namelen fs/reiserfs/namei.c:82 [inline]
 search_by_entry_key+0x7d0/0xe88 fs/reiserfs/namei.c:172
 reiserfs_readdir_inode+0x230/0xf30 fs/reiserfs/dir.c:98
 reiserfs_readdir+0x48/0x58 fs/reiserfs/dir.c:274
 iterate_dir+0x1f4/0x4ec
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x1c4/0x4c4 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:00000000fe2dbec6 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x135dd3
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003d77508 fffffc0003a3e0c8 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f5dd2f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f5dd2f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000f5dd3000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                      ^
 ffff0000f5dd3080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f5dd3100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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