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net: add missing data-race annotations around sk->sk_peek_off

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[ Upstream commit 11695c6e96 ]

sk_getsockopt() runs locklessly, thus we need to annotate the read
of sk->sk_peek_off.

While we are at it, add corresponding annotations to sk_set_peek_off()
and unix_set_peek_off().

Fixes: b9bb53f383 ("sock: convert sk_peek_offset functions to WRITE_ONCE")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet
2023-07-28 15:03:16 +00:00
committed by Greg Kroah-Hartman
parent b53468041d
commit dd7a1ff07c
2 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
net/core/sock.c
View File

@@ -1815,7 +1815,7 @@ int sk_getsockopt(struct sock *sk, int level, int optname,
if (!sock->ops->set_peek_off) if (!sock->ops->set_peek_off)
return -EOPNOTSUPP; return -EOPNOTSUPP;
v.val = sk->sk_peek_off; v.val = READ_ONCE(sk->sk_peek_off);
break; break;
case SO_NOFCS: case SO_NOFCS:
v.val = sock_flag(sk, SOCK_NOFCS); v.val = sock_flag(sk, SOCK_NOFCS);
@@ -3119,7 +3119,7 @@ EXPORT_SYMBOL(__sk_mem_reclaim);
int sk_set_peek_off(struct sock *sk, int val) int sk_set_peek_off(struct sock *sk, int val)
{ {
sk->sk_peek_off = val; WRITE_ONCE(sk->sk_peek_off, val);
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(sk_set_peek_off); EXPORT_SYMBOL_GPL(sk_set_peek_off);

2
net/unix/af_unix.c
View File

@@ -779,7 +779,7 @@ static int unix_set_peek_off(struct sock *sk, int val)
if (mutex_lock_interruptible(&u->iolock)) if (mutex_lock_interruptible(&u->iolock))
return -EINTR; return -EINTR;
sk->sk_peek_off = val; WRITE_ONCE(sk->sk_peek_off, val);
mutex_unlock(&u->iolock); mutex_unlock(&u->iolock);
return 0; return 0;