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31 lines
1.1 KiB
31 lines
1.1 KiB
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# HG changeset patch
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# User Glenn Randers-Pehrson <glennrp+bmo@gmail.com>
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# Date 1499262082 14400
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# Node ID dea93a690fc125f70fb8688a0ff3035b96b0045e
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# Parent a42ae8447fe7a457790bf699371a1a6f3c6d4e57
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Stop crash due to zero-length color_image while reading a JNG
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diff -r a42ae8447fe7 -r dea93a690fc1 coders/png.c
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--- a/coders/png.c Tue Jul 04 16:33:37 2017 -0500
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+++ b/coders/png.c Wed Jul 05 09:41:22 2017 -0400
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@@ -3314,12 +3314,13 @@
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if (logging)
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(void) LogMagickEvent(CoderEvent,GetMagickModule(),
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- " Copying JDAT chunk data"
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- " to color_blob.");
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- if (color_image != (Image *)NULL)
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+ " Copying %lu bytes of JDAT chunk data"
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+ " to color_blob.",length);
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+ if (length && color_image != (Image *)NULL)
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+ {
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(void) WriteBlob(color_image,length,(char *) chunk);
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- if (length)
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MagickFreeMemory(chunk);
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+ }
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continue;
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}
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