proresdec_lgpl: explicitly check coff[3] against slice_data_size
authorAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Wed, 9 Nov 2016 22:49:46 +0000 (23:49 +0100)
committerAndreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Thu, 17 Nov 2016 22:15:47 +0000 (23:15 +0100)
commit1ed4b527321f4380d18aeb4306574f4b6ec610c7
tree5e1309c9c39e56a52382c631e7b114449aafb7dc
parent72a2d6ff56ce2e06a756d1f86cae300944838096
proresdec_lgpl: explicitly check coff[3] against slice_data_size

The implicit checks via v_data_size and a_data_size don't work in the case
'(hdr_size > 7) && !ctx->alpha_info'.

This fixes segmentation faults due to invalid reads.

This problem was introduced in commit
547c2f002a87f4412a83c23b0d60364be5e7ce58.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 1e33035ee7a8d9fb7a4b8b6cc54842e72b36ed70)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
libavcodec/proresdec_lgpl.c