Blame SOURCES/0010-quic-Check-we-have-some-data-to-start-decoding-quic-.patch
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From d9cc2d4659950df230dfe30e5445b91d4c15604e Mon Sep 17 00:00:00 2001
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From: Frediano Ziglio <freddy77@gmail.com>
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Date: Wed, 29 Apr 2020 15:09:13 +0100
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Subject: [PATCH spice-common 1/4] quic: Check we have some data to start
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decoding quic image
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All paths already pass some data to quic_decode_begin but for the
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test check it, it's not that expensive test.
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Checking for not 0 is enough, all other words will potentially be
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read calling more_io_words but we need one to avoid a potential
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initial buffer overflow or deferencing an invalid pointer.
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Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
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Acked-by: Uri Lublin <uril@redhat.com>
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---
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common/quic.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/spice-common/common/quic.c b/spice-common/common/quic.c
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index 55a5d6c..e03f3af 100644
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--- a/spice-common/common/quic.c
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+++ b/spice-common/common/quic.c
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@@ -1136,7 +1136,7 @@ int quic_decode_begin(QuicContext *quic, uint32_t *io_ptr, unsigned int num_io_w
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int channels;
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int bpc;
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- if (!encoder_reset(encoder, io_ptr, io_ptr_end)) {
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+ if (!num_io_words || !encoder_reset(encoder, io_ptr, io_ptr_end)) {
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return QUIC_ERROR;
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}
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--
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2.25.4
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