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SslHandler.wrap(...) must ensure it not loose the original exception when finishWrap(...) fails (#9974) 

Motivation:

When SslHandler.finishWrap throws an exception, ensure that the promise and buf is not reused to avoid throwing IllegalArgumentException or IllegalReferenceCountException which causes the original exception to be lost.

Modification:

The change ensures that the values for the promise and bytebuf are nulled before calling finishWrap so that it will not be called again with the same arguments.

Result:

Fixes #9971 .

Co-authored-by: Norman Maurer <norman_maurer@apple.com>

Co-authored-by: Antony T Curtis <atcurtis@gmail.com>
This commit is contained in:
Norman Maurer 2020-01-29 08:46:38 +01:00
parent b19958eda9
commit a2bf0bfd7a
1 changed files with 17 additions and 3 deletions
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20
handler/src/main/java/io/netty/handler/ssl/SslHandler.java
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@ -860,11 +860,25 @@ public class SslHandler extends ByteToMessageDecoder {
case NOT_HANDSHAKING:
setHandshakeSuccessIfStillHandshaking();
// deliberate fall-through
case NEED_WRAP:
finishWrap(ctx, out, promise, inUnwrap, false);
case NEED_WRAP: {
ChannelPromise p = promise;
// Null out the promise so it is not reused in the finally block in the cause of
// finishWrap(...) throwing.
promise = null;
out = null;
final ByteBuf b;
if (out.isReadable()) {
// There is something in the out buffer. Ensure we null it out so it is not re-used.
b = out;
out = null;
} else {
// If out is not readable we can re-use it and so save an extra allocation
b = null;
}
finishWrap(ctx, b, p, inUnwrap, false);
break;
}
case NEED_UNWRAP:
needUnwrap = true;
return;