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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2022-03-15 18:34:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 15:39:51 +0300 |
| commit | 7af164fa2f1abc577d357d22d83a2f3490875d7e (patch) | |
| tree | 5e3d59e9c24db46e6cdac16f9c82ff1050f6c721 /include/linux/sunrpc | |
| parent | 65e21cc042f4c1518c8c55283f53bc725b78419d (diff) | |
| download | linux-7af164fa2f1abc577d357d22d83a2f3490875d7e.tar.xz | |
NFSD: prevent integer overflow on 32 bit systems
commit 23a9dbbe0faf124fc4c139615633b9d12a3a89ef 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>
Diffstat (limited to 'include/linux/sunrpc')
| -rw-r--r-- | include/linux/sunrpc/xdr.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index b998e4b73691..6d9d1520612b 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -603,6 +603,8 @@ xdr_stream_decode_uint32_array(struct xdr_stream *xdr, if (unlikely(xdr_stream_decode_u32(xdr, &len) < 0)) return -EBADMSG; + if (len > SIZE_MAX / sizeof(*p)) + return -EBADMSG; p = xdr_inline_decode(xdr, len * sizeof(*p)); if (unlikely(!p)) return -EBADMSG; |