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    Subject[PATCH 03/23] bpfilter: switch to kernel_write
    Date
    While pipes don't really need sb_writers projection, __kernel_write is an
    interface better kept private, and the additional rw_verify_area does not
    hurt here.

    Signed-off-by: Christoph Hellwig <hch@lst.de>
    ---
    net/bpfilter/bpfilter_kern.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c
    index c0f0990f30b604..1905e01c3aa9a7 100644
    --- a/net/bpfilter/bpfilter_kern.c
    +++ b/net/bpfilter/bpfilter_kern.c
    @@ -50,7 +50,7 @@ static int __bpfilter_process_sockopt(struct sock *sk, int optname,
    req.len = optlen;
    if (!bpfilter_ops.info.pid)
    goto out;
    - n = __kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req),
    + n = kernel_write(bpfilter_ops.info.pipe_to_umh, &req, sizeof(req),
    &pos);
    if (n != sizeof(req)) {
    pr_err("write fail %zd\n", n);
    --
    2.26.2
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