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avcodec/jpeglsdec: Increase range for N in ls_get_code_runterm() by using unsigned 

Fixes: left shift of 32768 by 16 places cannot be represented in type 'int'
Fixes: Timeout
Fixes: 44219/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SMVJPEG_fuzzer-4679455379947520
Fixes: 44088/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SMVJPEG_fuzzer-4885976600674304

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-02-05 20:41:08 +01:00
parent 5038933977
commit 6ee283d7d0
1 changed files with 1 additions and 1 deletions
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libavcodec/jpeglsdec.c
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@ -191,7 +191,7 @@ static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state,
if (RItype)
temp += state->N[Q] >> 1;
for (k = 0; (state->N[Q] << k) < temp; k++)
for (k = 0; ((unsigned)state->N[Q] << k) < temp; k++)
;
#ifdef JLS_BROKEN