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BIO: prevent crash on NULL BIO for prefix_ctrl() and thus for BIO_set_prefix(), BIO_s...
author
Dr. David von Oheimb
<David.von.Oheimb@siemens.com>
Sat, 12 Jun 2021 09:27:28 +0000
(11:27 +0200)
committer
Dr. David von Oheimb
<dev@ddvo.net>
Tue, 15 Jun 2021 12:23:21 +0000
(14:23 +0200)
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15722)
crypto/bio/bf_prefix.c
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diff --git
a/crypto/bio/bf_prefix.c
b/crypto/bio/bf_prefix.c
index 5727c14950e271db297ee56e111e8585c9bd41f7..c9059ca80aeb3cbbe858265fcb790883335c6696 100644
(file)
--- a/
crypto/bio/bf_prefix.c
+++ b/
crypto/bio/bf_prefix.c
@@
-151,9
+151,9
@@
static int prefix_write(BIO *b, const char *out, size_t outl,
static long prefix_ctrl(BIO *b, int cmd, long num, void *ptr)
{
long ret = 0;
- PREFIX_CTX *ctx
= BIO_get_data(b)
;
+ PREFIX_CTX *ctx;
- if (
ctx
== NULL)
+ if (
b == NULL || (ctx = BIO_get_data(b))
== NULL)
return -1;
switch (cmd) {