Commit 72dba1244d for qemu.org

commit 72dba1244df7487512bbca76285dafe11ff30c7d
Author: Yonggang Luo <luoyonggang@gmail.com>
Date:   Fri Oct 9 02:41:18 2026 +0800

    tests/qtest: fix PXE test build on MinGW

    Replace the GNU-specific memmem() call with a bounded memcmp()
    search. Preserve binary BIOS scanning across embedded NUL bytes
    without relying on a function unavailable on MinGW.

    Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
    Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
    Tested-by: Eric Farman <farman@linux.ibm.com>
    Link: https://lore.kernel.org/qemu-devel/20261008184119.142-2-luoyonggang@gmail.com
    Signed-off-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>

diff --git a/tests/qtest/pxe-test.c b/tests/qtest/pxe-test.c
index 61c92a2df4..37d74d7ee0 100644
--- a/tests/qtest/pxe-test.c
+++ b/tests/qtest/pxe-test.c
@@ -111,10 +111,18 @@ static bool s390_bios_has_string(const char *needle)
 {
     const char *contents;
     gsize len;
-    bool found;
+    size_t needle_len = strlen(needle);
+    bool found = false;

     contents = s390_bios_load(&len);
-    found = memmem(contents, len, needle, strlen(needle)) != NULL;
+    if (needle_len <= len) {
+        for (gsize i = 0; i <= len - needle_len; i++) {
+            if (memcmp(contents + i, needle, needle_len) == 0) {
+                found = true;
+                break;
+            }
+        }
+    }

     g_test_message("\"%s\" %s in bios", needle, found ? "found" : "not found");
     return found;