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jpeglsdec: Prevent out of array write.

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 00ab9cdae1)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-02-13 23:50:35 +01:00
parent 313ddbfe48
commit 001f4c7dc6
1 changed files with 3 additions and 0 deletions
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libavcodec/jpeglsdec.c
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@ -198,6 +198,9 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
r = ff_log2_run[state->run_index[comp]];
if(r)
r = get_bits_long(&s->gb, r);
if(x + r * stride > w) {
r = (w - x) / stride;
}
for(i = 0; i < r; i++) {
W(dst, x, Ra);
x += stride;