md: Avoid write invalid address if read_seqretry returned true.
authormajianpeng <majianpeng@gmail.com>
Thu, 8 Nov 2012 00:56:27 +0000 (08:56 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 3 Dec 2012 19:47:06 +0000 (11:47 -0800)
commit8c98fbaa55508732bb5a9f46b3c6cf60daa8e526
tree7ff077f3f6fbb1db0766c721bf867f069aa8e558
parent45bc5c6913e04f1346bfe3401d2f52ad2164b3b2
md: Avoid write invalid address if read_seqretry returned true.

commit 35f9ac2dcec8f79d7059ce174fd7b7ee3290d620 upstream.

If read_seqretry returned true and bbp was changed, it will write
invalid address which can cause some serious problem.

This bug was introduced by commit v3.0-rc7-130-g2699b67.
So fix is suitable for 3.0.y thru 3.6.y.

Reported-by: zhuwenfeng@kedacom.com
Tested-by: zhuwenfeng@kedacom.com
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/md/md.c