diff options
| author | Xu Kuohai <xukuohai@huawei.com> | 2023-08-04 10:37:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-16 19:27:26 +0300 |
| commit | 6b2824b198a638d5ea45df81fa9acb1699eda8b3 (patch) | |
| tree | b65920ad623dbf832feb98c6d5521e5ac7745a9e /net | |
| parent | ed90fe7435c573897c2ab7624f24d67c866f94a9 (diff) | |
| download | linux-6b2824b198a638d5ea45df81fa9acb1699eda8b3.tar.xz | |
bpf, sockmap: Fix bug that strp_done cannot be called
commit 809e4dc71a0f2b8d2836035d98603694fff11d5d upstream.
strp_done is only called when psock->progs.stream_parser is not NULL,
but stream_parser was set to NULL by sk_psock_stop_strp(), called
by sk_psock_drop() earlier. So, strp_done can never be called.
Introduce SK_PSOCK_RX_ENABLED to mark whether there is strp on psock.
Change the condition for calling strp_done from judging whether
stream_parser is set to judging whether this flag is set. This flag is
only set once when strp_init() succeeds, and will never be cleared later.
Fixes: c0d95d3380ee ("bpf, sockmap: Re-evaluate proto ops when psock is removed from sockmap")
Signed-off-by: Xu Kuohai <xukuohai@huawei.com>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20230804073740.194770-3-xukuohai@huaweicloud.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/skmsg.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/core/skmsg.c b/net/core/skmsg.c index 65fb6f5b21b2..296e45b6c3c0 100644 --- a/net/core/skmsg.c +++ b/net/core/skmsg.c @@ -1117,13 +1117,19 @@ static void sk_psock_strp_data_ready(struct sock *sk) int sk_psock_init_strp(struct sock *sk, struct sk_psock *psock) { + int ret; + static const struct strp_callbacks cb = { .rcv_msg = sk_psock_strp_read, .read_sock_done = sk_psock_strp_read_done, .parse_msg = sk_psock_strp_parse, }; - return strp_init(&psock->strp, sk, &cb); + ret = strp_init(&psock->strp, sk, &cb); + if (!ret) + sk_psock_set_state(psock, SK_PSOCK_RX_STRP_ENABLED); + + return ret; } void sk_psock_start_strp(struct sock *sk, struct sk_psock *psock) @@ -1151,7 +1157,7 @@ void sk_psock_stop_strp(struct sock *sk, struct sk_psock *psock) static void sk_psock_done_strp(struct sk_psock *psock) { /* Parser has been stopped */ - if (psock->progs.stream_parser) + if (sk_psock_test_state(psock, SK_PSOCK_RX_STRP_ENABLED)) strp_done(&psock->strp); } #else |