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-rw-r--r--crypto/dsa/dsa_gen.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/crypto/dsa/dsa_gen.c b/crypto/dsa/dsa_gen.c
index 46f4f01ee0e4..383d853b6d37 100644
--- a/crypto/dsa/dsa_gen.c
+++ b/crypto/dsa/dsa_gen.c
@@ -327,6 +327,12 @@ int dsa_builtin_paramgen2(DSA *ret, size_t L, size_t N,
if (mctx == NULL)
goto err;
+ /* make sure L > N, otherwise we'll get trapped in an infinite loop */
+ if (L <= N) {
+ DSAerr(DSA_F_DSA_BUILTIN_PARAMGEN2, DSA_R_INVALID_PARAMETERS);
+ goto err;
+ }
+
if (evpmd == NULL) {
if (N == 160)
evpmd = EVP_sha1();