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http2: Fix address sanitizer memcpy warning

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- In Curl_http2_switched don't call memcpy when src is NULL.

Curl_http2_switched can be called like:

Curl_http2_switched(conn, NULL, 0);

.. and prior to this change memcpy was then called like:

memcpy(dest, NULL, 0)

.. causing address sanitizer to warn:

http2.c:2057:3: runtime error: null pointer passed as argument 2, which
is declared to never be null
This commit is contained in:
Jay Satiro 2016-11-16 02:16:10 -05:00
parent 03d707fc5f
commit b65f79d9e8
1 changed files with 2 additions and 1 deletions
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3
lib/http2.c
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@ -2054,7 +2054,8 @@ CURLcode Curl_http2_switched(struct connectdata *conn,
" after upgrade: len=%zu\n",
nread);
memcpy(httpc->inbuf, mem, nread);
if(nread)
memcpy(httpc->inbuf, mem, nread);
httpc->inbuflen = nread;
nproc = nghttp2_session_mem_recv(httpc->h2, (const uint8_t *)httpc->inbuf,