1 files changed, 18 insertions, 11 deletions

diff --git a/src/lib/libcrypto/err/err.c b/src/lib/libcrypto/err/err.c
index c4192c6bfa..c44a065486 100644
--- a/src/lib/libcrypto/err/err.c
+++ b/src/lib/libcrypto/err/err.c
@@ -829,9 +829,9 @@ static unsigned long get_error_values(int inc, int top, const char **file, int *
 
 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
         {
-        char lsbuf[64], fsbuf[64], rsbuf[64];
+        char lsbuf[30], fsbuf[30], rsbuf[30];
         const char *ls,*fs,*rs;
-        unsigned long l,f,r;
+        int l, f, r, ret;
 
         l=ERR_GET_LIB(e);
         f=ERR_GET_FUNC(e);
@@ -841,16 +841,23 @@ void ERR_error_string_n(unsigned long e, char *buf, size_t len)
         fs=ERR_func_error_string(e);
         rs=ERR_reason_error_string(e);
 
-        if (ls == NULL) 
-                snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
-        if (fs == NULL)
-                snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
-        if (rs == NULL)
-                snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
+        if (ls == NULL) {
+                (void) snprintf(lsbuf, sizeof(lsbuf), "lib(%d)", l);
+                ls = lsbuf;
+        }
+        if (fs == NULL) {
+                (void) snprintf(fsbuf, sizeof(fsbuf), "func(%d)", f);
+                fs = fsbuf;
+        }
+        if (rs == NULL) {
+                (void) snprintf(rsbuf, sizeof(rsbuf), "reason(%d)", r);
+                rs = rsbuf;
+        }
 
-        snprintf(buf, len,"error:%08lX:%s:%s:%s", e, ls?ls:lsbuf, 
-                fs?fs:fsbuf, rs?rs:rsbuf);
-        if (strlen(buf) == len-1)
+        ret = snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, fs, rs);
+        if (ret == -1)
+                return; /* can't happen, and can't do better if it does */
+        if (ret >= len)
                 {
                 /* output may be truncated; make sure we always have 5 
                  * colon-separated fields, i.e. 4 colons ... */