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Code Issues Releases Activity

avcodec/mjpegdec: Fix integer overflow in shift

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Fixes: signal_sigabrt_7ffff6ac7bb9_2683_cov_4120310995_m_ijpg.avi
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-11-27 19:27:05 +01:00
parent 92fa1d9231
commit 970a8f1c25
1 changed files with 3 additions and 2 deletions
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5
libavcodec/mjpegdec.c
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@ -244,7 +244,8 @@ int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
{
int len, nb_components, i, width, height, bits, pix_fmt_id, ret;
int len, nb_components, i, width, height, bits, ret;
unsigned pix_fmt_id;
int h_count[MAX_COMPONENTS];
int v_count[MAX_COMPONENTS];
@ -383,7 +384,7 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
else if (!s->lossless)
s->rgb = 0;
/* XXX: not complete test ! */
pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
pix_fmt_id = ((unsigned)s->h_count[0] << 28) | (s->v_count[0] << 24) |
(s->h_count[1] << 20) | (s->v_count[1] << 16) |
(s->h_count[2] << 12) | (s->v_count[2] << 8) |
(s->h_count[3] << 4) | s->v_count[3];