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authorMichael Niedermayer <michael@niedermayer.cc>2020-04-26 19:29:39 +0200
committerMichael Niedermayer <michael@niedermayer.cc>2020-05-02 17:30:02 +0200
commit49ae034b42234486712a02f9b00253a0975cea02 (patch)
tree8d0e2e5be9cb74788cfbef6f18dbe71c14f84b5b /libavcodec
parent62e4003780cad60ac1371fef892da08c27069964 (diff)
downloadffmpeg-49ae034b42234486712a02f9b00253a0975cea02.tar.gz
avcodec/alacdsp: Fix invalid shift in append_extra_bits()
Fixes: left shift of negative value -1 Fixes: 21390/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-6242539519868928 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
-rw-r--r--libavcodec/alacdsp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/alacdsp.c b/libavcodec/alacdsp.c
index ecbaedb067..9996eb4319 100644
--- a/libavcodec/alacdsp.c
+++ b/libavcodec/alacdsp.c
@@ -49,7 +49,7 @@ static void append_extra_bits(int32_t *buffer[2], int32_t *extra_bits_buffer[2],
for (ch = 0; ch < channels; ch++)
for (i = 0; i < nb_samples; i++)
- buffer[ch][i] = (buffer[ch][i] << extra_bits) | extra_bits_buffer[ch][i];
+ buffer[ch][i] = ((unsigned)buffer[ch][i] << extra_bits) | extra_bits_buffer[ch][i];
}
av_cold void ff_alacdsp_init(ALACDSPContext *c)