diff options
| author | Michael Niedermayer <[email protected]> | 2019-12-14 19:19:57 +0100 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2020-07-01 13:33:44 +0200 |
| commit | 9872730c3cbbe168a7c85e4eb70a19a603b4efae (patch) | |
| tree | 749eedc1db705167d6a1be78ba32ace44da21e43 | |
| parent | 762d17ddac88d400415636f632b942d59181f48c (diff) | |
avcodec/pnm: Check that the header is not truncated
Fixes: Ticket8430
Reviewed-by: Paul B Mahol <[email protected]>
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit c94cb8d9b21baeeecef962c72965dbedc4e0b0e1)
Signed-off-by: Michael Niedermayer <[email protected]>
| -rw-r--r-- | libavcodec/pnm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavcodec/pnm.c b/libavcodec/pnm.c index b06a6e81b5..b5d074f1f8 100644 --- a/libavcodec/pnm.c +++ b/libavcodec/pnm.c @@ -108,6 +108,9 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s) return AVERROR_INVALIDDATA; } } + if (!pnm_space(s->bytestream[-1])) + return AVERROR_INVALIDDATA; + /* check that all tags are present */ if (w <= 0 || h <= 0 || maxval <= 0 || maxval > UINT16_MAX || depth <= 0 || tuple_type[0] == '\0' || av_image_check_size(w, h, 0, avctx) || s->bytestream >= s->bytestream_end) @@ -188,6 +191,10 @@ int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext * const s) } }else s->maxval=1; + + if (!pnm_space(s->bytestream[-1])) + return AVERROR_INVALIDDATA; + /* more check if YUV420 */ if (av_pix_fmt_desc_get(avctx->pix_fmt)->flags & AV_PIX_FMT_FLAG_PLANAR) { if ((avctx->width & 1) != 0) |