linux-kernel - Re: [PATCH 00 of 33] Set of ipath patches for 2.6.22

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Message-ID: <aday7kzooa7.fsf@cisco.com>
Date:	Tue, 10 Apr 2007 15:30:40 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	"Bryan O'Sullivan" <bos@...hscale.com>
Cc:	openib-general@...nfabrics.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00 of 33] Set of ipath patches for 2.6.22

I just queued all of this for 2.6.22.

Is there any chance of getting a fix for the use-after-free that can
be caused by allocating something from userspace, failing to mmap the
buffer and then exiting?  To see what happens, look at how
ipath_create_cq sticks a struct ipath_mmap_info into the pending mmap
"list" (and yes it would be much cleaner to just use struct list_head
here rather than reimplementing a linked list yourself), and then look
at how ipath_destroy_cq() frees the same structure without checking if
it has been removed from the pending mmap list.

 - R.
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