[FFmpeg-cvslog] avcodec/aacenc: Check both channels for finiteness

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sat Jan 16 18:32:07 2016 +0100| [8008a029ab40db3353611548f1a4a15452b81434] | committer: Michael Niedermayer

avcodec/aacenc: Check both channels for finiteness

Fixes null pointer dereference
Fixes: 10412fc52ecc6eab40ed67f82ca7b372/signal_sigsegv_2618c99_2129_f808373959e46afb165593332799ffbc.aif

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 057549a9ccc9fd32df71678e6abe69e10668186a)

Conflicts:

	libavcodec/aacenc.c

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8008a029ab40db3353611548f1a4a15452b81434
---

 libavcodec/aacenc.c |   12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/libavcodec/aacenc.c b/libavcodec/aacenc.c
index a7c7336..7b643f5 100644
--- a/libavcodec/aacenc.c
+++ b/libavcodec/aacenc.c
@@ -572,8 +572,16 @@ static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
             }
 
             apply_window_and_mdct(s, &cpe->ch[ch], overlap);
-            if (isnan(cpe->ch->coeffs[0])) {
-                av_log(avctx, AV_LOG_ERROR, "Input contains NaN\n");
+
+            if (isnan(cpe->ch[ch].coeffs[    0]) || isinf(cpe->ch[ch].coeffs[    0]) ||
+                isnan(cpe->ch[ch].coeffs[  128]) || isinf(cpe->ch[ch].coeffs[  128]) ||
+                isnan(cpe->ch[ch].coeffs[2*128]) || isinf(cpe->ch[ch].coeffs[2*128]) ||
+                isnan(cpe->ch[ch].coeffs[3*128]) || isinf(cpe->ch[ch].coeffs[3*128]) ||
+                isnan(cpe->ch[ch].coeffs[4*128]) || isinf(cpe->ch[ch].coeffs[4*128]) ||
+                isnan(cpe->ch[ch].coeffs[5*128]) || isinf(cpe->ch[ch].coeffs[5*128]) ||
+                isnan(cpe->ch[ch].coeffs[6*128]) || isinf(cpe->ch[ch].coeffs[6*128]) ||
+                isnan(cpe->ch[ch].coeffs[7*128]) || isinf(cpe->ch[ch].coeffs[7*128])) {
+                av_log(avctx, AV_LOG_ERROR, "Input contains NaN/+-Inf\n");
                 return AVERROR(EINVAL);
             }
             avoid_clipping(s, &cpe->ch[ch]);