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Fixed undefined behavior in ssl_read if buf parameter is NULL.

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Signed-off-by: Ashley Duncan <ashes.man@gmail.com>
This commit is contained in:
Ashley Duncan 2022-02-11 09:57:18 +13:00 committed by Dave Rodgman
parent 4dcc08c244
commit 272cc19ab5
1 changed files with 4 additions and 2 deletions
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6
library/ssl_msg.c
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@ -5429,8 +5429,10 @@ int mbedtls_ssl_read(mbedtls_ssl_context *ssl, unsigned char *buf, size_t len)
n = (len < ssl->in_msglen)
? len : ssl->in_msglen;
memcpy(buf, ssl->in_offt, n);
ssl->in_msglen -= n;
if (buf) {
memcpy(buf, ssl->in_offt, n);
ssl->in_msglen -= n;
}
/* Zeroising the plaintext buffer to erase unused application data
from the memory. */