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authorJulian Andres Klode <jak@debian.org>2016-08-31 17:01:04 +0200
committerJulian Andres Klode <jak@debian.org>2016-08-31 17:39:06 +0200
commit923c592ceb6014b31ec751b97b3ed659fa3e88ae (patch)
tree844f89090a5e427ced68312c6dcf5004ee11979d /test
parent832f95f4d018f18ff7b3d0381206f25b5a4373a6 (diff)
TagFile: Fix off-by-one errors in comment stripping
Adding 1 to the value of d->End - current makes restLength one byte too long: If we pass memchr(current, ..., restLength) has thus undefined behavior. Also, reading the value of current has undefined behavior if current >= d->End, not only for current > d->End: Consider a string of length 1, that is d->End = d->Current + 1. We can only read at d->Current + 0, but d->Current + 1 is beyond the end of the string. This probably caused several inexplicable build failures on hurd-i386 in the past, and just now caused a build failure on Ubuntu's amd64 builder. Reported-By: valgrind
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