3 files changed, 22 insertions, 7 deletions

diff --git a/lib/libc/regex/regcomp.c b/lib/libc/regex/regcomp.c
index 586621c5a745e..d815382cb3011 100644
--- a/lib/libc/regex/regcomp.c
+++ b/lib/libc/regex/regcomp.c
@@ -1841,21 +1841,29 @@ computejumps(struct parse *p, struct re_guts *g)
 {
 	int ch;
 	int mindex;
+	int cmin, cmax;
+
+	/*
+	 * For UTF-8 we process only the first 128 characters corresponding to
+	 * the POSIX locale.
+	 */
+	cmin = MB_CUR_MAX == 1 ? CHAR_MIN : 0;
+	cmax = MB_CUR_MAX == 1 ? CHAR_MAX : 127;
 
 	/* Avoid making errors worse */
 	if (p->error != 0)
 		return;
 
-	g->charjump = (int*) malloc((NC + 1) * sizeof(int));
+	g->charjump = (int *)malloc((cmax - cmin + 1) * sizeof(int));
 	if (g->charjump == NULL)	/* Not a fatal error */
 		return;
 	/* Adjust for signed chars, if necessary */
-	g->charjump = &g->charjump[-(CHAR_MIN)];
+	g->charjump = &g->charjump[-(cmin)];
 
 	/* If the character does not exist in the pattern, the jump
 	 * is equal to the number of characters in the pattern.
 	 */
-	for (ch = CHAR_MIN; ch < (CHAR_MAX + 1); ch++)
+	for (ch = cmin; ch < cmax + 1; ch++)
 		g->charjump[ch] = g->mlen;
 
 	/* If the character does exist, compute the jump that would
diff --git a/lib/libc/regex/regex2.h b/lib/libc/regex/regex2.h
index a7c45683229c1..a1a37172a55b4 100644
--- a/lib/libc/regex/regex2.h
+++ b/lib/libc/regex/regex2.h
@@ -113,7 +113,7 @@ typedef struct {
 	wint_t		max;
 } crange;
 typedef struct {
-	unsigned char	bmp[NC / 8];
+	unsigned char	bmp[NC_MAX / 8];
 	wctype_t	*types;
 	unsigned int	ntypes;
 	wint_t		*wides;
@@ -133,9 +133,14 @@ CHIN1(cset *cs, wint_t ch)
 	if (ch < NC)
 		return (((cs->bmp[ch >> 3] & (1 << (ch & 7))) != 0) ^
 		    cs->invert);
-	for (i = 0; i < cs->nwides; i++)
-		if (ch == cs->wides[i])
+	for (i = 0; i < cs->nwides; i++) {
+		if (cs->icase) {
+			if (ch == towlower(cs->wides[i]) ||
+			    ch == towupper(cs->wides[i]))
+				return (!cs->invert);
+		} else if (ch == cs->wides[i])
 			return (!cs->invert);
+	}
 	for (i = 0; i < cs->nranges; i++)
 		if (cs->ranges[i].min <= ch && ch <= cs->ranges[i].max)
 			return (!cs->invert);
diff --git a/lib/libc/regex/utils.h b/lib/libc/regex/utils.h
index b2dba2ee4e93a..72f2286a02602 100644
--- a/lib/libc/regex/utils.h
+++ b/lib/libc/regex/utils.h
@@ -39,7 +39,9 @@
 /* utility definitions */
 #define	DUPMAX		_POSIX2_RE_DUP_MAX	/* xxx is this right? */
 #define	INFINITY	(DUPMAX + 1)
-#define	NC		(CHAR_MAX - CHAR_MIN + 1)
+
+#define	NC_MAX		(CHAR_MAX - CHAR_MIN + 1)
+#define	NC		((MB_CUR_MAX) == 1 ? (NC_MAX) : (128))
 typedef unsigned char uch;
 
 /* switch off assertions (if not already off) if no REDEBUG */