diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-03-16 01:10:09 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-03-17 08:52:05 +0000 |
| commit | 1051ce4ab64db91f7b62369ddc321ba8747f8c84 (patch) | |
| tree | f2a6bf0ebfc9e1c06f12fe4879deb5547baf7128 /net/packet/af_packet.c | |
| parent | fd53c297aa7b077ae98a3d3d2d3aa278a1686ba6 (diff) | |
net/packet: annotate accesses to po->tp_tstamp
tp_tstamp is read locklessly.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet/af_packet.c')
| -rw-r--r-- | net/packet/af_packet.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index ecd9fc27e360..a27a811fa2b0 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -474,7 +474,7 @@ static __u32 __packet_set_timestamp(struct packet_sock *po, void *frame, struct timespec64 ts; __u32 ts_status; - if (!(ts_status = tpacket_get_timestamp(skb, &ts, po->tp_tstamp))) + if (!(ts_status = tpacket_get_timestamp(skb, &ts, READ_ONCE(po->tp_tstamp)))) return 0; h.raw = frame; @@ -2403,7 +2403,8 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, * closer to the time of capture. */ ts_status = tpacket_get_timestamp(skb, &ts, - po->tp_tstamp | SOF_TIMESTAMPING_SOFTWARE); + READ_ONCE(po->tp_tstamp) | + SOF_TIMESTAMPING_SOFTWARE); if (!ts_status) ktime_get_real_ts64(&ts); @@ -3945,7 +3946,7 @@ packet_setsockopt(struct socket *sock, int level, int optname, sockptr_t optval, if (copy_from_sockptr(&val, optval, sizeof(val))) return -EFAULT; - po->tp_tstamp = val; + WRITE_ONCE(po->tp_tstamp, val); return 0; } case PACKET_FANOUT: @@ -4097,7 +4098,7 @@ static int packet_getsockopt(struct socket *sock, int level, int optname, val = po->tp_loss; break; case PACKET_TIMESTAMP: - val = po->tp_tstamp; + val = READ_ONCE(po->tp_tstamp); break; case PACKET_FANOUT: val = (po->fanout ? |