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selftests: net: tcp_mmap: clear whole tcp_zerocopy_receive struct

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We added fields in tcp_zerocopy_receive structure,
so make sure to clear all fields to not pass garbage to the kernel.

We were lucky because recent additions added 'out' parameters,
still we need to clean our reference implementation, before folks
copy/paste it.

Fixes: c8856c0514 ("tcp-zerocopy: Return inq along with tcp receive zerocopy.")
Fixes: 33946518d4 ("tcp-zerocopy: Return sk_err (if set) along with tcp receive zerocopy.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Arjun Roy <arjunroy@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2020-05-05 20:51:06 -07:00 • committed by David S. Miller
parent 38212bb31f
commit bf5525f3a8
1 changed files with 2 additions and 1 deletions
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3
tools/testing/selftests/net/tcp_mmap.c
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@ -165,9 +165,10 @@ void *child_thread(void *arg)
socklen_t zc_len = sizeof(zc);
int res;
memset(&zc, 0, sizeof(zc));
zc.address = (__u64)((unsigned long)addr);
zc.length = chunk_size;
zc.recv_skip_hint = 0;
res = getsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE,
&zc, &zc_len);
if (res == -1)