================
@@ -443,3 +443,33 @@ void test_unaligned_start_read(void) {
fclose(fp);
}
}
+
+void no_crash_if_count_is_negative(long s, unsigned char *buffer) {
+ FILE *fp = fopen("path", "r");
+ if (fp) {
+ if (s * s == -1) {
----------------
NagyDonat wrote:
Nitpick: $s^2 = -1$ is mathematically impossible (even if we allow overflows:
`0xffff...f` $= (4^{k})^2 - 1$ where $k$ is the number of `f` digits and two
consecutive integers that are >1 cannot be both perfect squares). I know that
the static analyzer doesn't know this and will happily assume that `s * s ==
-1` -- but it would be still nicer to use a different example.
https://github.com/llvm/llvm-project/pull/108393
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