[PATCH v10 08/12] net, arm64: untag user pointers in tcp_zerocopy_receive

tcp_zerocopy_receive() uses provided user pointers for vma lookups, which can only by done with untagged pointers.

Untag user pointers in this function.

Signed-off-by: Andrey Konovalov andreyknvl@google.com --- net/ipv4/tcp.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index cf3c5095c10e..80f3c1fb9809 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1756,6 +1756,8 @@ static int tcp_zerocopy_receive(struct sock *sk, int inq; int ret;

+ address = untagged_addr(address); + if (address & (PAGE_SIZE - 1) || address != zc->address) return -EINVAL;