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authorDavid Kalnischkies <kalnischkies@gmail.com>2013-08-15 16:49:51 +0200
committerDavid Kalnischkies <kalnischkies@gmail.com>2013-08-15 17:39:24 +0200
commit0aae6d14390193e25ab6d0fd49295bd7b131954f (patch)
tree35c63ba45e67bdee4d074a955cf3d3011841cc89 /apt-pkg/sourcelist.h
parent037374fe7260c104771d1b6d31c36a98385c2365 (diff)
ensure that pkgTagFile isn't writing past Buffer length
In 91c4cc14d3654636edf997d23852f05ad3de4853 I removed the +256 from the pkgTagFile call parsing Release files as I couldn't find a mentioning of a reason for why and it was marked as XXX which suggested that at least someone else was suspicious. It turns out that it is indeed "documented", it just didn't found it at first but the changelog of apt 0.6.6 (29. Dec 2003) mentions: * Restore the ugly hack I removed from indexRecords::Load which set the pkgTagFile buffer size to (file size)+256. This is concealing a bug, but I can't fix it right now. This should fix the segfaults that folks are seeing with 0.6.[45]. The bug it is "hiding" is that if pkgTagFile works with a file which doesn't end in a double newline it will be adding it without checking if the Buffer is big enough to store them. Its also not a good idea to let the End pointer be past the end of our space, even if we don't access the data. Closes: 719629
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