3 files changed, 20 insertions, 1 deletions
diff --git a/usr/src/lib/brand/lx/lx_brand/common/file.c b/usr/src/lib/brand/lx/lx_brand/common/file.c
index c0e4caadc9..c3fcc39738 100644
--- a/usr/src/lib/brand/lx/lx_brand/common/file.c
+++ b/usr/src/lib/brand/lx/lx_brand/common/file.c
@@ -743,12 +743,30 @@ lx_linkat(uintptr_t ext1, uintptr_t p1, uintptr_t ext2, uintptr_t p2,
 }
 
 int
+lx_readlink(uintptr_t p1, uintptr_t p2, uintptr_t p3)
+{
+	int ret;
+
+	if ((size_t)p3 <= 0)
+		return (-EINVAL);
+
+	ret = readlink((char *)p1, (char *)p2, (size_t)p3);
+	if (ret < 0)
+		return (-errno);
+
+	return (ret);
+}
+
+int
 lx_readlinkat(uintptr_t ext1, uintptr_t p1, uintptr_t p2, uintptr_t p3)
 {
 	int atfd = (int)ext1;
 	char pathbuf[MAXPATHLEN];
 	int ret;
 
+	if ((size_t)p3 <= 0)
+		return (-EINVAL);
+
 	ret = getpathat(atfd, p1, pathbuf, sizeof (pathbuf));
 	if (ret < 0)
 		return (ret);
diff --git a/usr/src/lib/brand/lx/lx_brand/common/lx_brand.c b/usr/src/lib/brand/lx/lx_brand/common/lx_brand.c
index 976817ccec..1079de8690 100644
--- a/usr/src/lib/brand/lx/lx_brand/common/lx_brand.c
+++ b/usr/src/lib/brand/lx/lx_brand/common/lx_brand.c
@@ -1020,7 +1020,7 @@ static struct lx_sysent sysents[] = {
 	{"select",	NULL,		NOSYS_OBSOLETE,	0},	/* 82 */
 	{"symlink",	symlink,	SYS_PASSTHRU,	2},	/* 83 */
 	{"oldlstat",	NULL,		NOSYS_OBSOLETE,	0},	/* 84 */
-	{"readlink",	readlink,	SYS_PASSTHRU,	3},	/* 85 */
+	{"readlink",	lx_readlink,	0,		3},	/* 85 */
 	{"uselib",	NULL,		NOSYS_KERNEL,	0},	/* 86 */
 	{"swapon",	NULL,		NOSYS_KERNEL,	0},	/* 87 */
 	{"reboot",	lx_reboot,	0,		4},	/* 88 */
diff --git a/usr/src/lib/brand/lx/lx_brand/sys/lx_syscall.h b/usr/src/lib/brand/lx/lx_brand/sys/lx_syscall.h
index cc84b3ec32..5bd4e5887a 100644
--- a/usr/src/lib/brand/lx/lx_brand/sys/lx_syscall.h
+++ b/usr/src/lib/brand/lx/lx_brand/sys/lx_syscall.h
@@ -68,6 +68,7 @@ extern int lx_fcntl(uintptr_t, uintptr_t, uintptr_t);
 extern int lx_fcntl64(uintptr_t, uintptr_t, uintptr_t);
 extern int lx_flock(uintptr_t, uintptr_t);
 extern int lx_open(uintptr_t, uintptr_t, uintptr_t);
+extern int lx_readlink(uintptr_t, uintptr_t, uintptr_t);
 extern int lx_readdir(uintptr_t, uintptr_t, uintptr_t);
 extern int lx_getdents(uintptr_t, uintptr_t, uintptr_t);
 extern int lx_getdents64(uintptr_t, uintptr_t, uintptr_t);