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BUG: KASAN: use-after-free in strlen+0x5c/0x84 lib/string.c:502
Read of size 1 at addr ffff0000e2660008 by task syz-executor/4332

CPU: 1 PID: 4332 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 strlen+0x5c/0x84 lib/string.c:502
 __fortify_strlen include/linux/fortify-string.h:196 [inline]
 set_de_name_and_namelen fs/reiserfs/namei.c:82 [inline]
 search_by_entry_key+0x7b0/0xe34 fs/reiserfs/namei.c:172
 reiserfs_readdir_inode+0x1d0/0xdc8 fs/reiserfs/dir.c:98
 reiserfs_readdir+0x48/0x58 fs/reiserfs/dir.c:274
 iterate_dir+0x1f0/0x4cc fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __arm64_sys_getdents64+0x11c/0x318 fs/readdir.c:354
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the physical page:
page:000000001141608e refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x122660
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 fffffc0003899848 fffffc0003899788 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e265ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e265ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e2660000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                      ^
 ffff0000e2660080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e2660100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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