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avcodec/jpeglsdec: Fix k=16 in ls_get_code_regular()

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Fixes: Timeout
Fixes: left shift of 33046 by 16 places cannot be represented in type 'int'
Fixes: 29258/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MJPEG_fuzzer-4889231489105920
Fixes: 29515/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MJPEG_fuzzer-6161940391002112

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 980900d991606cbc3747b37d6e83c7aae98cbecc)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-30 19:37:52 +01:00
parent 9ab85e03ca
commit eb1dc002c6
1 changed files with 1 additions and 1 deletions
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libavcodec/jpeglsdec.c
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@ -149,7 +149,7 @@ static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q)
{
int k, ret;
for (k = 0; (state->N[Q] << k) < state->A[Q]; k++)
for (k = 0; ((unsigned)state->N[Q] << k) < state->A[Q]; k++)
;
#ifdef JLS_BROKEN