GraphicsMagick: coders/tga.c Fixed issue related to oss-fuzz-52084.

changeset 7147bc58f042 in /hg/GraphicsMagick
details: http://hg.GraphicsMagick.org/hg/GraphicsMagick?cmd=changeset;node=7147bc58f042
summary: coders/tga.c Fixed issue related to oss-fuzz-52084.

diffstat:

 coders/tga.c |  3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diffs (13 lines):

diff -r 33acd8182934 -r 7147bc58f042 coders/tga.c
--- a/coders/tga.c	Mon Oct 03 00:22:15 2022 +0200
+++ b/coders/tga.c	Mon Oct 03 20:01:37 2022 +0200
@@ -440,7 +440,8 @@
               image->colors=tga_info.colormap_length;
               (void) LogMagickEvent(CoderEvent,GetMagickModule(),
                                     "Using existing colormap with %u colors.",image->colors);
-
+              if(tga_info.bits_per_pixel==1 && image->colors<=1)
+		  ThrowReaderException(CoderError,ColorTypeNotSupported,image);
             }
           else
             {