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fs/iso9660: Require matching filenames on multi-extent continuations

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Mintsuki
2026-04-17 02:19:57 +02:00
parent 03ad4a421c
commit 6f6564d40d
1 changed files with 13 additions and 0 deletions
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13
common/fs/iso9660.s2.c
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@@ -425,10 +425,23 @@ struct file_handle *iso9660_open(struct volume *vol, const char *path) {
uint64_t total_size = entry->extent_size.little;
struct iso9660_directory_entry *e = entry;
char base_name[256];
if (!load_name(base_name, sizeof(base_name), entry)) {
base_name[0] = '\0';
}
while (e->flags & ISO9660_FLAG_MULTI_EXTENT) {
struct iso9660_directory_entry *next = iso9660_next_entry(e, buffer_end);
if (next == NULL)
break;
// Per ECMA-119, multi-extent continuation records must share
// the file identifier of the first record. Refuse to splice
// in unrelated entries.
char next_name[256];
if (!load_name(next_name, sizeof(next_name), next)
|| strcmp(base_name, next_name) != 0) {
break;
}
e = next;
extent_count++;
total_size += e->extent_size.little;