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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-03 23:55:50 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-06 01:50:33 +0200 |
| commit | 7d3da77756b54913e8b02b362ed97caa21337493 (patch) | |
| tree | 0a5b587cbb73560808f4e816d39fca121e49de40 | |
| parent | a957f43072324659f9203387f24c2c410d9b7707 (diff) | |
| download | ffmpeg-7d3da77756b54913e8b02b362ed97caa21337493.tar.gz | |
avcodec/pnmdec: Fix misaligned reads
Found-by: "Steinar H. Gunderson" <steinar+ffmpeg@gunderson.no>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit ea28ce9bc13803ccef97850388ddc9a73998a23e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/pnmdec.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/pnmdec.c b/libavcodec/pnmdec.c index 2c98e26934..b625d8d3c4 100644 --- a/libavcodec/pnmdec.c +++ b/libavcodec/pnmdec.c @@ -172,7 +172,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data, } else if (upgrade == 2) { unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval; for (j = 0; j < n / 2; j++) { - v = av_be2ne16(((uint16_t *)s->bytestream)[j]); + v = AV_RB16(s->bytestream + 2*j); ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15; } } @@ -226,7 +226,7 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data, return AVERROR_INVALIDDATA; for (i = 0; i < avctx->height; i++) { for (j = 0; j < n / 2; j++) { - v = av_be2ne16(((uint16_t *)s->bytestream)[j]); + v = AV_RB16(s->bytestream + 2*j); ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15; } s->bytestream += n; @@ -238,13 +238,13 @@ static int pnm_decode_frame(AVCodecContext *avctx, void *data, h = avctx->height >> 1; for (i = 0; i < h; i++) { for (j = 0; j < n / 2; j++) { - v = av_be2ne16(((uint16_t *)s->bytestream)[j]); + v = AV_RB16(s->bytestream + 2*j); ptr1[j] = (v * f + 16384) >> 15; } s->bytestream += n; for (j = 0; j < n / 2; j++) { - v = av_be2ne16(((uint16_t *)s->bytestream)[j]); + v = AV_RB16(s->bytestream + 2*j); ptr2[j] = (v * f + 16384) >> 15; } s->bytestream += n; |