Messages in this thread | | | Date | Thu, 11 Jan 2001 14:12:05 +0100 (CET) | Subject | Re: Subtle MM bug | From | Trond Myklebust <> |
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>>>>> " " == Stephen C Tweedie <sct@redhat.com> writes:
> Hi, On Wed, Jan 10, 2001 at 12:11:16PM -0800, Linus Torvalds > wrote: >> >> That said, we can easily support the notion of CLONE_CRED if we >> absolutely have to (and sane people just shouldn't use it), so >> if somebody wants to work on this for 2.5.x...
> But is it really worth the pain? I'd hate to have to audit the > entire VFS to make sure that it works if another thread changes > our credentials in the middle of a syscall, so we either end up > having to lock the credentials over every VFS syscall, or take > a copy of the credentials and pass it through every VFS > internal call that we make.
What's wrong with copy-on-write style semantics? IOW, anyone who wants to change the credentials needs to make a private copy of the existing structure first.
Cheers, Trond - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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