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avcodec/jpeglsdec: Check run value more completely in ls_decode_line()
previously it could have been by 1 too large Fixes out of array access Fixes: asan_heap-oob_12240f5_1_asan_heap-oob_12240f5_448_t8c1e3.jls Fixes: asan_heap-oob_12240f5_1_asan_heap-oob_12240f5_448_t8nde0.jls Fixes: asan_heap-oob_12240fa_1_asan_heap-oob_12240fa_448_t16e3.jls Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -269,6 +269,11 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s,
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x += stride;
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}
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if (x >= w) {
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av_log(NULL, AV_LOG_ERROR, "run overflow\n");
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return;
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}
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/* decode run termination value */
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Rb = R(last, x);
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RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0;
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