nixpkgs/pkgs/applications/misc/djvulibre/fix_hongfuzz_crash.patch

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commit 89d71b01d606e57ecec2c2930c145bb20ba5bbe3
Author: Leon Bottou <leon@bottou.org>
Date: Fri Jul 13 08:46:22 2018 -0400
fix hongfuzz crash.
diff --git a/libdjvu/DjVmDir.cpp b/libdjvu/DjVmDir.cpp
index d322323..a6a39e0 100644
--- a/libdjvu/DjVmDir.cpp
+++ b/libdjvu/DjVmDir.cpp
@@ -299,7 +299,13 @@ DjVmDir::decode(const GP<ByteStream> &gstr)
memcpy((char*) strings+strings_size, buffer, length);
}
DEBUG_MSG("size of decompressed names block=" << strings.size() << "\n");
-
+ if (strings[strings.size()-1] != 0)
+ {
+ int strings_size=strings.size();
+ strings.resize(strings_size+1);
+ strings[strings_size] = 0;
+ }
+
// Copy names into the files
const char * ptr=strings;
for(pos=files_list;pos;++pos)
diff --git a/libdjvu/miniexp.cpp b/libdjvu/miniexp.cpp
index 6a5cd90..828addc 100644
--- a/libdjvu/miniexp.cpp
+++ b/libdjvu/miniexp.cpp
@@ -1065,7 +1065,7 @@ print_c_string(const char *s, char *d, int flags, size_t len)
c = (unsigned char)(*s++);
if (char_quoted(c, flags))
{
- char buffer[10];
+ char buffer[16]; /* 10+1 */
static const char *tr1 = "\"\\tnrbf";
static const char *tr2 = "\"\\\t\n\r\b\f";
buffer[0] = buffer[1] = 0;
diff --git a/tools/csepdjvu.cpp b/tools/csepdjvu.cpp
index 7ed13ad..fab9472 100644
--- a/tools/csepdjvu.cpp
+++ b/tools/csepdjvu.cpp
@@ -1834,7 +1834,7 @@ main(int argc, const char **argv)
ByteStream::create(GURL::Filename::UTF8(arg),"rb");
BufferByteStream ibs(*fbs);
do {
- char pagename[16];
+ char pagename[20];
sprintf(pagename, "p%04d.djvu", ++pageno);
if (opts.verbose > 1)
DjVuPrintErrorUTF8("%s","--------------------\n");