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NFSD: prevent integer overflow on 32 bit systems
commit 23a9dbbe0f
upstream.
On a 32 bit system, the "len * sizeof(*p)" operation can have an
integer overflow.
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 2 additions and 0 deletions
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@ -603,6 +603,8 @@ xdr_stream_decode_uint32_array(struct xdr_stream *xdr,
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if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0))
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return -EBADMSG;
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if (len > SIZE_MAX / sizeof(*p))
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return -EBADMSG;
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p = xdr_inline_decode(xdr, len * sizeof(*p));
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if (unlikely(!p))
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return -EBADMSG;
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