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authorRich Felker <dalias@aerifal.cx>2016-05-22 18:49:59 -0400
committerRich Felker <dalias@aerifal.cx>2016-05-22 18:49:59 -0400
commit81fb75a1d75c20d97292cbbe4cde6a1e65871abe (patch)
tree71138623e144edd910490f327696b546e14f7d67 /src/misc
parent51eeb6ebc94d965768143c45e9f39b0a7998bdbd (diff)
downloadmusl-81fb75a1d75c20d97292cbbe4cde6a1e65871abe.tar.gz
fix undefined pointer arithmetic in CMSG_NXTHDR macro
previously, the only way the stopping condition could be met with correct lengths in the headers invoked undefined behavior, adding sizeof(struct cmsghdr) beyond the end of the cmsg buffer. instead, compute and compare sizes rather than pointers.
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