avcodec/qdrw: Fix null pointer dereference
authorMichael Niedermayer <michael@niedermayer.cc>
Sun, 4 Jun 2017 19:37:47 +0000 (21:37 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Mon, 5 Jun 2017 01:33:56 +0000 (03:33 +0200)
commitc4a3020c1ba367632fb295fcfe35fdea773ba57e
treefcb22e6fd5d7aab3ec416d62b47c8f3f2b095c5c
parent1065957f7b05e6242e2ff5b5654e12994775c284
avcodec/qdrw: Fix null pointer dereference

The RGB555 PACKBITSRGN case tries to read a palette, if such
palette is actually stored then it accesses a null pointer.
All 16bit samples i could find use DIRECTBITSRGN.

Fixes: 2065/clusterfuzz-testcase-minimized-6298930457346048

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 46b865ea9f86cbd12e1bf701913263c7932cccb0)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/qdrw.c