Re: [PATCH] Add git-imap-send.

From: Junio C Hamano <junkio@cox.net>
Date: Mar 9, 2006, 18:09 UTC
Message-ID: <7vmzfz5w2k.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <Pine.LNX.4.64.0603090836030.18022@g5.osdl.org>

Linus Torvalds <torvalds@osdl.org> writes:

Show 6 quoted lines

> it's entirely possible that it will load bytes from "string" _past_ the 
> end of the string because of an unrolled inner loop that does things 
> multiple bytes at a time. They won't be used in the eventual result, but 
> just the fact that they are loaded from memory can mean that your program 
> takes a SIGSEGV, for example, becaue it turns out "string" was just a 
> single NUL byte at the end of a page, and there's nothing after it.

Funny. I've seen this exact bug in memcmp and strcmp in earlier SunOS (pre Solaris) libc when I was working on something like Valgrind in my previous life.