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authorTatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>2014-05-21 23:34:55 +0900
committerDaniel Stenberg <daniel@haxx.se>2014-05-23 17:00:07 +0200
commitc7638d93b0a2f24be7342fa9f902dab835dc837b (patch)
tree54f8b95f4ce4bf5087e864f6145645f9a1aae80c /docs/.gitignore
parent3b65aeda52e9847fb05049472b16198bd5002ffc (diff)
openssl: Fix uninitialized variable use in NPN callback
OpenSSL passes out and outlen variable uninitialized to select_next_proto_cb callback function. If the callback function returns SSL_TLSEXT_ERR_OK, the caller assumes the callback filled values in out and outlen and processes as such. Previously, if there is no overlap in protocol lists, curl code does not fill any values in these variables and returns SSL_TLSEXT_ERR_OK, which means we are triggering undefined behavior. valgrind warns this. This patch fixes this issue by fallback to HTTP/1.1 if there is no overlap.
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