ipv6: make sure to initialize sockc.tsflags before first use
authorAlexander Potapenko <glider@google.com>
Tue, 21 Mar 2017 16:14:27 +0000 (17:14 +0100)
committerDavid S. Miller <davem@davemloft.net>
Wed, 22 Mar 2017 19:40:22 +0000 (12:40 -0700)
commitd515684d78148884d5fc425ba904c50f03844020
tree9b48522dd41d5e36f4af6fe13de70f1d7a48931d
parent1b33c0d2a1885b64dbd9e4c4513b8051c4d984c9
ipv6: make sure to initialize sockc.tsflags before first use

In the case udp_sk(sk)->pending is AF_INET6, udpv6_sendmsg() would
jump to do_append_data, skipping the initialization of sockc.tsflags.
Fix the problem by moving sockc.tsflags initialization earlier.

The bug was detected with KMSAN.

Fixes: c14ac9451c34 ("sock: enable timestamping using control messages")
Signed-off-by: Alexander Potapenko <glider@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/udp.c