From 6ee283d7d001cfcfec94a023e172bca731e96514 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 5 Feb 2022 20:41:08 +0100 Subject: [PATCH] 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 --- libavcodec/jpeglsdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/jpeglsdec.c b/libavcodec/jpeglsdec.c index 269c71dc18..6ca723f797 100644 --- a/libavcodec/jpeglsdec.c +++ b/libavcodec/jpeglsdec.c @@ -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