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CVE-2019-14194/CVE-2019-14198: nfs: fix unbounded memcpy with a failed length check at nfs_read_reply

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This patch adds a check to rpc_pkt.u.reply.data at nfs_read_reply.

Signed-off-by: Cheng Liu <liucheng32@huawei.com>
Reported-by: Fermín Serna <fermin@semmle.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
liucheng (G) 2019-08-29 13:47:48 +00:00 • committed by Joe Hershberger
parent 741a8a08eb
commit aa207cf3a6
1 changed files with 3 additions and 0 deletions
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3
net/nfs.c
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@ -701,6 +701,9 @@ static int nfs_read_reply(uchar *pkt, unsigned len)
&(rpc_pkt.u.reply.data[4 + nfsv3_data_offset]);
}
if (((uchar *)&(rpc_pkt.u.reply.data[0]) - (uchar *)(&rpc_pkt) + rlen) > len)
return -9999;
if (store_block(data_ptr, nfs_offset, rlen))
return -9999;