Pedro F. Giffuni a46361116a Fix broken pointer overflow check ns_name_unpack() ...

Many compilers may optimize away the overflow check `msg + l < msg',
where `msg' is a pointer and `l' is an integer, because pointer
overflow is undefined behavior in C.

Use a safe precondition test `l >= eom - msg' instead.

Reference:
https://android-review.googlesource.com/#/c/50570/

Obtained from:	NetBSD (CVS rev. 1.10)
MFC after:	3 weeks

2014-08-07 16:40:24 +00:00

..

libc

Fix broken pointer overflow check ns_name_unpack()

2014-08-07 16:40:24 +00:00