Re: [PATCH] Ceph: Fix a use-after-free bug in ceph_destroy_client().
From: Jesper Juhl <hidden>
Date: 2010-12-25 21:45:06
Also in:
ceph-devel, lkml
From: Jesper Juhl <hidden>
Date: 2010-12-25 21:45:06
Also in:
ceph-devel, lkml
On Sat, 25 Dec 2010, richard -rw- weinberger wrote:
On Sat, Dec 25, 2010 at 10:24 PM, Jesper Juhl [off-list ref] wrote:quoted
On Sat, 25 Dec 2010, richard -rw- weinberger wrote:quoted
On Sat, Dec 25, 2010 at 7:17 PM, Jesper Juhl [off-list ref] wrote:quoted
Hello, In net/ceph/ceph_common.c::ceph_destroy_client() the pointer 'client' is freed by kfree() and subsequently used in a call to dout() - use after free bug.Not really. %p reads only the address of "client". kfree() does not alter this address.Ok, I see your point and you are correct. But still, the patch does not change behaviour and it makes it absolutely clear that there's no use-after-free bug, so it might still have merit... or?Your patch does not fix a bug. I would say it's a style fix.
At this point in time I'd agree. :-) -- Jesper Juhl [off-list ref] http://www.chaosbits.net/ Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please.