From: Mike Snitzer <snitzer@gmail.com>
Date: Wed, 2 Apr 2008 20:04:47 +0000 (-0700)
Subject: nbd: prevent sock_xmit from attempting to use a NULL socket
X-Git-Tag: v2.6.25-rc9~87
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ffc41cf8dbb1b895a87daf47d0e5bf6dfbfcab4c;p=pandora-kernel.git

nbd: prevent sock_xmit from attempting to use a NULL socket

NBD does not protect the nbd_device's socket from becoming NULL during
receives.

This closes a race with the NBD_CLEAR_SOCK ioctl (nbd-client -d) setting
the nbd_device's socket to NULL right before NBD calls sock_xmit.

Signed-off-by: Mike Snitzer <snitzer@gmail.com>
Cc: Paul Clements <paul.clements@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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