From: Dan Rosenberg <drosenberg@vsecurity.com>
Date: Wed, 17 Nov 2010 06:37:16 +0000 (+0000)
Subject: rds: Integer overflow in RDS cmsg handling
X-Git-Tag: v2.6.37-rc3~3^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=218854af84038d828a32f061858b1902ed2beec6;p=pandora-kernel.git

rds: Integer overflow in RDS cmsg handling

In rds_cmsg_rdma_args(), the user-provided args->nr_local value is
restricted to less than UINT_MAX.  This seems to need a tighter upper
bound, since the calculation of total iov_size can overflow, resulting
in a small sock_kmalloc() allocation.  This would probably just result
in walking off the heap and crashing when calling rds_rdma_pages() with
a high count value.  If it somehow doesn't crash here, then memory
corruption could occur soon after.

Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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