From: Xi Wang <xi.wang@gmail.com>
Date: Thu, 7 Jun 2012 00:35:55 +0000 (-0500)
Subject: libceph: fix overflow in osdmap_decode()
X-Git-Tag: v3.6-rc1~36^2~107
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e91a9b639a691e0982088b5954eaafb5a25c8f1c;p=pandora-kernel.git

libceph: fix overflow in osdmap_decode()

On 32-bit systems, a large `n' would overflow `n * sizeof(u32)' and bypass
the check ceph_decode_need(p, end, n * sizeof(u32), bad).  It would also
overflow the subsequent kmalloc() size, leading to out-of-bounds write.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Reviewed-by: Alex Elder <elder@inktank.com>
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