From: Prasanna S. Panchamukhi <prasanna.panchamukhi@riverbed.com>
Date: Thu, 24 Jun 2010 03:31:03 +0000 (+1000)
Subject: md: raid10: Fix null pointer dereference in fix_read_error()
X-Git-Tag: v2.6.35-rc4~52^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0544a21db02c1d8883158fd6f323364f830a120a;p=pandora-kernel.git

md: raid10: Fix null pointer dereference in fix_read_error()

Such NULL pointer dereference can occur when the driver was fixing the
read errors/bad blocks and the disk was physically removed
causing a system crash. This patch check if the
rcu_dereference() returns valid rdev before accessing it in fix_read_error().

Cc: stable@kernel.org
Signed-off-by: Prasanna S. Panchamukhi <prasanna.panchamukhi@riverbed.com>
Signed-off-by: Rob Becker <rbecker@riverbed.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

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