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Fix SIGSEGV by skipping non-readable stack guard pages #95

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Merged
JingMatrix merged 1 commit into from
Feb 19, 2026
Merged

Fix SIGSEGV by skipping non-readable stack guard pages #95

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6 changes: 5 additions & 1 deletion loader/src/injector/module.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -397,6 +397,10 @@ void ZygiskContext::nativeForkSystemServer_pre() {
for (auto &map : g_hook->cached_map_infos) {
if (map.dev == 0 && map.inode == 0 && map.offset == 0 && map.is_private &&
map.path == "[anon:stack_and_tls:main]") {
if ((map.perms & PROT_READ) == 0) {
LOGV("Skipping non-readable stack map at %p", reinterpret_cast<void *>(map.start));
continue;
}
auto search_from = reinterpret_cast<char *>(map.start);
auto search_to = reinterpret_cast<char *>(map.end);
spoof_zygote_fossil(search_from, search_to, "ref_profiles");
Expand Down Expand Up @@ -486,7 +490,7 @@ void ZygiskContext::nativeForkAndSpecialize_post() {
// -----------------------------------------------------------------

bool ZygiskContext::update_mount_namespace(zygiskd::MountNamespace namespace_type) {
const char* type_str = (namespace_type == zygiskd::MountNamespace::Clean ? "Clean" : "Root");
const char *type_str = (namespace_type == zygiskd::MountNamespace::Clean ? "Clean" : "Root");
LOGV("updating mount namespace to type %s", type_str);

int ns_fd = zygiskd::UpdateMountNamespace(namespace_type);
Expand Down
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