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Fix missing null terminator in runtime path resolution on Linux #85350

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Fix missing null terminator in runtime path resolution on Linux #85350

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5 changes: 3 additions & 2 deletions stdlib/public/runtime/Paths.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -548,8 +548,9 @@ _swift_initRuntimePath(void *) {
// this is needed with Musl when statically linking because in that case
// dladdr() does nothing.
char pathBuf[4096];
ssize_t len = readlink("/proc/self/exe", pathBuf, sizeof(pathBuf));
if (len > 0 && len < sizeof(pathBuf)) {
ssize_t len = readlink("/proc/self/exe", pathBuf, sizeof(pathBuf)-1);
if (len > 0 ) {
pathBuf[len] = '\0';
runtimePath = ::strdup(pathBuf);
return;
}
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