commit 2224c8ea7b901ba038fdeff13605a60563bd00d2
author Kleber Tarcísio <klebertarcisio@yahoo.com.br> Tue Jul 28 09:17:27 2020 -0300
committer Cosmin Truta <ctruta@gmail.com> Sat Mar 13 01:56:32 2021 -0500
tree 21e6908e68e777e1ae348d0cf39101d494cc5821
parent e2bb5e7512a48dcfe191065decac9cf78a68fd12

Add a check to pngimage.c

Check the result of png_get_IHDR inside the compare_read function.

Contributed-by: Kleber Tarcísio
Signed-off-by: Cosmin Truta

contrib/libtests/pngimage.c

diff --git a/contrib/libtests/pngimage.c b/contrib/libtests/pngimage.c
index 1fe499a..be176b2 100644
--- a/contrib/libtests/pngimage.c
+++ b/contrib/libtests/pngimage.c
@@ -1006,8 +1006,9 @@
    int interlace_method, compression_method, filter_method;
    const char *e = NULL;
 
-   png_get_IHDR(dp->read_pp, dp->read_ip, &width, &height, &bit_depth,
-      &color_type, &interlace_method, &compression_method, &filter_method);
+   if (!png_get_IHDR(dp->read_pp, dp->read_ip, &width, &height, &bit_depth,
+      &color_type, &interlace_method, &compression_method, &filter_method))
+      display_log(dp, LIBPNG_BUG, "png_get_IHDR failed");
 
 #  define C(item) if (item != dp->item) \
       display_log(dp, APP_WARNING, "IHDR " #item "(%lu) changed to %lu",\