This does not seem security relevant, so making this public. It's a bit
weird, though. The code called is
if (Map.Size() > sizeof(header)) {
adler = adler32(adler,
static_cast<const unsigned char *>(GetMap().Data()) +
sizeof(header),
GetMap().Size() - sizeof(header));
}
so, the map should be readable there and for that size. Something is off
with the size, though, it's about 140 TB. And the address is off, so
the mmap data structure must have gone completely nuts.
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https://bugs.launchpad.net/bugs/1726789
Title:
apt-get crashed with signal 7 in adler32_z()
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