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BIO_ctrl: Avoid spurious error being raised on NULL bio parameter

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Some of the functions are being called on NULL bio with the
expectation that such call will not raise an error.

Fixes #16681

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/16686)
This commit is contained in:
Tomas Mraz 2021-09-27 09:45:31 +02:00
parent c2ee608a23
commit 398ae82316
1 changed files with 4 additions and 12 deletions
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16
crypto/bio/bio_lib.c
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@ -563,10 +563,8 @@ long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
{
long ret;
if (b == NULL) {
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
if (b == NULL)
return -1;
}
if (b->method == NULL || b->method->ctrl == NULL) {
ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
return -2;
@ -591,10 +589,8 @@ long BIO_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
{
long ret;
if (b == NULL) {
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
if (b == NULL)
return -2;
}
if (b->method == NULL || b->method->callback_ctrl == NULL
|| cmd != BIO_CTRL_SET_CALLBACK) {
ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
@ -655,10 +651,8 @@ BIO *BIO_pop(BIO *b)
{
BIO *ret;
if (b == NULL) {
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
if (b == NULL)
return NULL;
}
ret = b->next_bio;
BIO_ctrl(b, BIO_CTRL_POP, 0, b);
@ -728,10 +722,8 @@ BIO *BIO_find_type(BIO *bio, int type)
BIO *BIO_next(BIO *b)
{
if (b == NULL) {
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
if (b == NULL)
return NULL;
}
return b->next_bio;
}