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(parent: d9b55bf) | patch
tcp: annotate sk->sk_rcvbuf lockless reads
authorEric Dumazet <edumazet@google.com>
Fri, 11 Oct 2019 03:17:44 +0000 (20:17 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sun, 13 Oct 2019 17:13:08 +0000 (10:13 -0700)
commitebb3b78db7bf842270a46fd4fe7cc45c78fa5ed6
tree9a0ecbc667473f785c77851f2db6c31f1fa3d2a4tree | snapshot
parentd9b55bf7b6788ec0bd1db1acefbc4feb1399144acommit | diff
tcp: annotate sk->sk_rcvbuf lockless reads

For the sake of tcp_poll(), there are few places where we fetch
sk->sk_rcvbuf while this field can change from IRQ or other cpu.

We need to add READ_ONCE() annotations, and also make sure write
sides use corresponding WRITE_ONCE() to avoid store-tearing.

Note that other transports probably need similar fixes.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/tcp.h diff | blob | history
include/trace/events/sock.h diff | blob | history
net/core/filter.c diff | blob | history
net/core/skbuff.c diff | blob | history
net/core/sock.c diff | blob | history
net/ipv4/tcp.c diff | blob | history
net/ipv4/tcp_input.c diff | blob | history
Domain: System / Kernel;