From 542cb11242cfc9be9b6218965751bfbb13a8b6a2 Mon Sep 17 00:00:00 2001
From: Zoltan Herczeg <hzmester@freemail.hu>
Date: Wed, 27 Dec 2023 08:27:17 +0000
Subject: [PATCH] Fix incorrect class character matches in JIT

---
 src/pcre2_jit_compile.c | 8 ++++++++
 src/pcre2_jit_test.c    | 1 +
 2 files changed, 9 insertions(+)

diff --git a/src/pcre2_jit_compile.c b/src/pcre2_jit_compile.c
index c8a51da..f612574 100644
--- a/src/pcre2_jit_compile.c
+++ b/src/pcre2_jit_compile.c
@@ -8170,6 +8170,7 @@ while (*cc != XCL_END)
 
       jump = CMP(SLJIT_NOT_EQUAL, typereg, 0, SLJIT_IMM, ucp_Cf - ucp_Ll);
 
+      c = charoffset;
       /* In case of ucp_Cf, we overwrite the result. */
       SET_CHAR_OFFSET(0x2066);
       OP2U(SLJIT_SUB | SLJIT_SET_LESS_EQUAL, TMP1, 0, SLJIT_IMM, 0x2069 - 0x2066);
@@ -8181,6 +8182,9 @@ while (*cc != XCL_END)
       OP2U(SLJIT_SUB | SLJIT_SET_Z, TMP1, 0, SLJIT_IMM, 0x180e - 0x2066);
       OP_FLAGS(SLJIT_OR, TMP2, 0, SLJIT_EQUAL);
 
+      /* Restore charoffset. */
+      SET_CHAR_OFFSET(c);
+
       JUMPHERE(jump);
       jump = CMP(SLJIT_ZERO ^ invertcmp, TMP2, 0, SLJIT_IMM, 0);
       break;
@@ -8196,6 +8200,7 @@ while (*cc != XCL_END)
 
       jump = CMP(SLJIT_NOT_EQUAL, typereg, 0, SLJIT_IMM, ucp_Cf - ucp_Ll);
 
+      c = charoffset;
       /* In case of ucp_Cf, we overwrite the result. */
       SET_CHAR_OFFSET(0x2066);
       OP2U(SLJIT_SUB | SLJIT_SET_LESS_EQUAL, TMP1, 0, SLJIT_IMM, 0x2069 - 0x2066);
@@ -8204,6 +8209,9 @@ while (*cc != XCL_END)
       OP2U(SLJIT_SUB | SLJIT_SET_Z, TMP1, 0, SLJIT_IMM, 0x061c - 0x2066);
       OP_FLAGS(SLJIT_OR, TMP2, 0, SLJIT_EQUAL);
 
+      /* Restore charoffset. */
+      SET_CHAR_OFFSET(c);
+
       JUMPHERE(jump);
       jump = CMP(SLJIT_ZERO ^ invertcmp, TMP2, 0, SLJIT_IMM, 0);
       break;
diff --git a/src/pcre2_jit_test.c b/src/pcre2_jit_test.c
index e4dace8..f2c714b 100644
--- a/src/pcre2_jit_test.c
+++ b/src/pcre2_jit_test.c
@@ -417,6 +417,7 @@ static struct regression_test_case regression_test_cases[] = {
 	{ MUP, 0, 0, 0, "[\\p{Lu}\\P{Latin}]+", "c\xEA\xA4\xAE,A,b" },
 	{ MUP, 0, 0, 0, "[\\x{a92e}\\p{Lu}\\P{Latin}]+", "c\xEA\xA4\xAE,A,b" },
 	{ CMUP, 0, 0, 0, "[^S]\\B", "\xe2\x80\x8a" },
+	{ MUP, 0, 0, 0 | F_NOMATCH, "[^[:print:]\\x{f6f6}]", "\xef\x9b\xb6" },
 
 	/* Possible empty brackets. */
 	{ MU, A, 0, 0, "(?:|ab||bc|a)+d", "abcxabcabd" },
-- 
2.33.0