From: Sage Weil <sage@inktank.com>
Date: Tue, 21 Aug 2012 19:11:51 +0000 (-0700)
Subject: ceph: avoid divide by zero in __validate_layout()
X-Git-Tag: v3.6-rc3~5^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=45f2e081f573526977abfa781a12728f83e9641f;p=pandora-kernel.git

ceph: avoid divide by zero in __validate_layout()

If "l->stripe_unit" is zero the the mod on the next line will cause a
divide by zero bug.  This comes from the copy_from_user() in
ceph_ioctl_set_layout_policy().  Passing 0 is valid, though (it means
"do not change") so avoid the % check in that case.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
---

Reading git-diff-tree failed