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| author | Eric Dumazet <edumazet@google.com> | 2023-05-09 16:35:53 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-05-10 09:58:29 +0100 |
| commit | e05a5f510f26607616fecdd4ac136310c8bea56b (patch) | |
| tree | a1629634b94064bbf20ac4e65b5f0885c0078d4e /net/socket.c | |
| parent | a939d14919b799e6fff8a9c80296ca229ba2f8a4 (diff) | |
| download | linux-stable-e05a5f510f26607616fecdd4ac136310c8bea56b.tar.gz linux-stable-e05a5f510f26607616fecdd4ac136310c8bea56b.tar.bz2 linux-stable-e05a5f510f26607616fecdd4ac136310c8bea56b.zip | |
net: annotate sk->sk_err write from do_recvmmsg()
do_recvmmsg() can write to sk->sk_err from multiple threads.
As said before, many other points reading or writing sk_err
need annotations.
Fixes: 34b88a68f26a ("net: Fix use after free in the recvmmsg exit path")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c index a7b4b37d86df..b7e01d0fe082 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2911,7 +2911,7 @@ static int do_recvmmsg(int fd, struct mmsghdr __user *mmsg, * error to return on the next call or if the * app asks about it using getsockopt(SO_ERROR). */ - sock->sk->sk_err = -err; + WRITE_ONCE(sock->sk->sk_err, -err); } out_put: fput_light(sock->file, fput_needed); |