From: Martin K. Petersen <martin.petersen@oracle.com>
Date: Wed, 9 Apr 2014 02:43:43 +0000 (-0400)
Subject: block: Fix for_each_bvec()
X-Git-Tag: v3.15-rc1~35^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7aa84d9cb9f26da1a9312c3e39dbd1a3c25a426;p=pandora-kernel.git

block: Fix for_each_bvec()

Commit 4550dd6c6b062 introduced for_each_bvec() which iterates over each
bvec attached to a bio or bip. However, the macro fails to check bi_size
before dereferencing which can lead to crashes while counting/mapping
integrity scatterlist segments.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: Nicholas Bellinger <nab@linux-iscsi.org>
Cc: <stable@vger.kernel.org> # v3.14+
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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