From: Clemens Ladisch <clemens@ladisch.de>
Date: Fri, 15 Oct 2010 10:06:18 +0000 (+0200)
Subject: ALSA: rawmidi: fix oops (use after free) when unloading a driver module
X-Git-Tag: v2.6.36~12^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa73aec6c385e2c797ac25cc7ccf0318031de7c8;p=pandora-kernel.git

ALSA: rawmidi: fix oops (use after free) when unloading a driver module

When a driver module is unloaded and the last still open file is a raw
MIDI device, the card and its devices will be actually freed in the
snd_card_file_remove() call when that file is closed.  Afterwards, rmidi
and rmidi->card point into freed memory, so the module pointer is likely
to be garbage.
(This was introduced by commit 9a1b64caac82aa02cb74587ffc798e6f42c6170a.)

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reported-by: Krzysztof Foltman <wdev@foltman.com>
Cc: 2.6.30-2.6.35 <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

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