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fix: ignore missing /proc/config.gz in isVmapStack #4

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fix: ignore missing /proc/config.gz in isVmapStack #4

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35 changes: 35 additions & 0 deletions android-14.0.0_r75/frameworks/base/0001-ignore-isvmapstack-error.patch
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Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: You <you@example.com>
Date: Fri, 31 Oct 2025 00:00:00 +0000
Subject: [PATCH] Debug: tolerate missing /proc/config.gz in isVmapStack()

When /proc/config.gz is unavailable on the host, LoadKernelConfigs()
fails and the old CHECK() would abort system_server. Treat this as
"CONFIG_VMAP_STACK unset" instead of crashing.

---
frameworks/base/core/jni/android_os_Debug.cpp | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/frameworks/base/core/jni/android_os_Debug.cpp b/frameworks/base/core/jni/android_os_Debug.cpp
index 0000000000..0000000000 100644
--- a/frameworks/base/core/jni/android_os_Debug.cpp
+++ b/frameworks/base/core/jni/android_os_Debug.cpp
@@ -XXX,7 +XXX,14 @@ static jboolean android_os_Debug_isVmapStack(JNIEnv *env, jobject clazz)
if (cfg_state == CONFIG_UNKNOWN) {
std::map<std::string, std::string> configs;
const status_t result = android::kernelconfigs::LoadKernelConfigs(&configs);
- CHECK(result == OK) << "Kernel configs could not be fetched. b/151092221";
+ if (result != OK) {
+ // Host kernel didn't expose /proc/config.gz (CONFIG_IKCONFIG{,_PROC} missing or module not loaded).
+ // Do not crash system_server; assume CONFIG_VMAP_STACK is unset.
+ ALOGW("Kernel configs not available; assuming CONFIG_VMAP_STACK is unset");
+ cfg_state = CONFIG_UNSET;
+ return JNI_FALSE;
+ }
+
std::map<std::string, std::string>::const_iterator it = configs.find("CONFIG_VMAP_STACK");
cfg_state = (it != configs.end() && it->second == "y") ? CONFIG_SET : CONFIG_UNSET;
}
--
2.43.0