shithub: aacdec

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Fix a couple buffer overflows

https://hackerone.com/reports/502816
https://hackerone.com/reports/507858

https://github.com/videolan/vlc/blob/master/contrib/src/faad2/faad2-fix-overflows.patch

--- a/libfaad/bits.c

+++ b/libfaad/bits.c

@@ -167,7 +167,10 @@

     int words = bits >> 5;

     int remainder = bits & 0x1F;

-    ld->bytes_left = ld->buffer_size - words*4;

+    if (ld->buffer_size < words * 4)

+        ld->bytes_left = 0;

+    else

+        ld->bytes_left = ld->buffer_size - words*4;

     if (ld->bytes_left >= 4)

     {

--- a/libfaad/syntax.c

+++ b/libfaad/syntax.c

@@ -2304,6 +2304,8 @@

     while ((drc->additional_excluded_chns[n-1] = faad_get1bit(ld

         DEBUGVAR(1,104,"excluded_channels(): additional_excluded_chns"))) == 1)

     {

+        if (i >= MAX_CHANNELS - num_excl_chan - 7)

+            return n;

         for (i = num_excl_chan; i < num_excl_chan+7; i++)

         {

             drc->exclude_mask[i] = faad_get1bit(ld