png: check bit depth for PAL8/Y400A pixel formats.
authorRonald S. Bultje <rsbultje@gmail.com>
Wed, 2 May 2012 17:58:55 +0000 (10:58 -0700)
committerReinhard Tartler <siretart@tauware.de>
Sun, 3 Jun 2012 17:04:51 +0000 (19:04 +0200)
commitd34e9e61dd619a14e3d29760f6bc8cd5b1a19d9f
tree9e83e0872c9c94c430158efcc60b33dc6a7e5563
parentc38d3e1a39b28937692a2c0eb39b25d8bc07d7bb
png: check bit depth for PAL8/Y400A pixel formats.

Wrong bit depth can lead to invalid rowsize values, which crashes the
decoder further down.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
(cherry picked from commit d2205d6543881f2e6fa18c8a354bbcf91a1235f7)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
libavcodec/pngdec.c