From 56785a85dbf35fb7274bf62f5d8a90705a3d7be1 Mon Sep 17 00:00:00 2001
From: arshidkv12 <arshidkv12@gmail.com>
Date: Sat, 17 Jan 2026 14:47:24 +0530
Subject: [PATCH 1/3] ext/gmp: fix bug16502 test expected error message

---
 ext/gmp/gmp.c               |  8 ++++++++
 ext/gmp/tests/bug16502.phpt | 17 +++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 ext/gmp/tests/bug16502.phpt

diff --git a/ext/gmp/gmp.c b/ext/gmp/gmp.c
index b5451b8035e37..f2746a6e500de 100644
--- a/ext/gmp/gmp.c
+++ b/ext/gmp/gmp.c
@@ -372,6 +372,14 @@ static zend_result shift_operator_helper(gmp_binary_ui_op_t op, zval *return_val
 			goto typeof_op_failure;
 		}
 
+		if (shift > INT_MAX && opcode == ZEND_POW) {
+			zend_throw_error(
+				zend_ce_value_error, "Exponent must be less than %d",
+				INT_MAX
+			);
+			ZVAL_UNDEF(return_value);
+			return FAILURE;
+		}
 		INIT_GMP_RETVAL(gmpnum_result);
 		op(gmpnum_result, gmpnum_op, (gmp_ulong) shift);
 		return SUCCESS;
diff --git a/ext/gmp/tests/bug16502.phpt b/ext/gmp/tests/bug16502.phpt
new file mode 100644
index 0000000000000..965405cff5256
--- /dev/null
+++ b/ext/gmp/tests/bug16502.phpt
@@ -0,0 +1,17 @@
+--TEST--
+pow() with GMP exponent too large should throw ValueError
+--EXTENSIONS--
+gmp
+--FILE--
+<?php
+$a = gmp_init(10000000000);
+
+try {
+    pow($a, $a);
+    echo "NO_EXCEPTION\n";
+} catch (ValueError $e) {
+    echo $e->getMessage(), "\n";
+}
+?>
+--EXPECTREGEX--
+Exponent must be less than [0-9]+
\ No newline at end of file

From 03397545804fbe00f1235bfe0608837e623baa61 Mon Sep 17 00:00:00 2001
From: arshidkv12 <arshidkv12@gmail.com>
Date: Sat, 17 Jan 2026 15:50:23 +0530
Subject: [PATCH 2/3] ext/gmp: fix bug16502 test expected error message

---
 ext/gmp/gmp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ext/gmp/gmp.c b/ext/gmp/gmp.c
index f2746a6e500de..dd8389bc0c57d 100644
--- a/ext/gmp/gmp.c
+++ b/ext/gmp/gmp.c
@@ -372,10 +372,10 @@ static zend_result shift_operator_helper(gmp_binary_ui_op_t op, zval *return_val
 			goto typeof_op_failure;
 		}
 
-		if (shift > INT_MAX && opcode == ZEND_POW) {
+		if (shift > SHRT_MAX && opcode == ZEND_POW) {
 			zend_throw_error(
 				zend_ce_value_error, "Exponent must be less than %d",
-				INT_MAX
+				SHRT_MAX
 			);
 			ZVAL_UNDEF(return_value);
 			return FAILURE;

From bc67ae2d760183cc855013374b6cb786ba3d18d8 Mon Sep 17 00:00:00 2001
From: arshidkv12 <arshidkv12@gmail.com>
Date: Sat, 17 Jan 2026 16:24:12 +0530
Subject: [PATCH 3/3] ext/gmp: fix bug16502 test expected error message

---
 ext/gmp/gmp.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/ext/gmp/gmp.c b/ext/gmp/gmp.c
index dd8389bc0c57d..e0b64e8dfed5c 100644
--- a/ext/gmp/gmp.c
+++ b/ext/gmp/gmp.c
@@ -372,10 +372,11 @@ static zend_result shift_operator_helper(gmp_binary_ui_op_t op, zval *return_val
 			goto typeof_op_failure;
 		}
 
-		if (shift > SHRT_MAX && opcode == ZEND_POW) {
+		if (shift > INT_MAX / 1000) {
 			zend_throw_error(
-				zend_ce_value_error, "Exponent must be less than %d",
-				SHRT_MAX
+				zend_ce_value_error, "%s must be less than %d",
+				opcode == ZEND_POW ? "Exponent" : "Shift",
+				(INT_MAX / 1000)
 			);
 			ZVAL_UNDEF(return_value);
 			return FAILURE;