From 205957405d08ef199e6ab654e333a627bbca9ccc Mon Sep 17 00:00:00 2001 From: valdaarhun Date: Mon, 25 Jul 2022 18:49:19 +0530 Subject: [PATCH] Fixes segfault occurrence in PEM_write() Checks if header is NULL or not before calling strlen(). CLA: trivial Fixes #18825 Reviewed-by: Tomas Mraz Reviewed-by: Ben Kaduk Reviewed-by: Paul Dale (Merged from https://github.com/openssl/openssl/pull/18865) --- crypto/pem/pem_lib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/pem/pem_lib.c b/crypto/pem/pem_lib.c index 544d6c51b72..98050f8348d 100644 --- a/crypto/pem/pem_lib.c +++ b/crypto/pem/pem_lib.c @@ -624,7 +624,7 @@ int PEM_write_bio(BIO *bp, const char *name, const char *header, (BIO_write(bp, "-----\n", 6) != 6)) goto err; - i = strlen(header); + i = header != NULL ? strlen(header) : 0; if (i > 0) { if ((BIO_write(bp, header, i) != i) || (BIO_write(bp, "\n", 1) != 1)) goto err; -- 2.47.2