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| author | John Fastabend <john.fastabend@gmail.com> | 2020-01-11 07:12:03 +0100 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-01-15 23:26:13 +0100 |
| commit | cf21e9ba1eb86c9333ca5b05b2f1cc94021bcaef (patch) | |
| tree | b2010fdecca8c5ea9f0078a7725ca5ac0e285f45 | |
| parent | bpf: Sockmap, skmsg helper overestimates push, pull, and pop bounds (diff) | |
| download | linux-cf21e9ba1eb86c9333ca5b05b2f1cc94021bcaef.tar.xz linux-cf21e9ba1eb86c9333ca5b05b2f1cc94021bcaef.zip | |
bpf: Sockmap/tls, msg_push_data may leave end mark in place
Leaving an incorrect end mark in place when passing to crypto
layer will cause crypto layer to stop processing data before
all data is encrypted. To fix clear the end mark on push
data instead of expecting users of the helper to clear the
mark value after the fact.
This happens when we push data into the middle of a skmsg and
have room for it so we don't do a set of copies that already
clear the end flag.
Fixes: 6fff607e2f14b ("bpf: sk_msg program helper bpf_msg_push_data")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/bpf/20200111061206.8028-6-john.fastabend@gmail.com
| -rw-r--r-- | net/core/filter.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index ffa2278020d7..538f6a735a19 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -2415,6 +2415,7 @@ BPF_CALL_4(bpf_msg_push_data, struct sk_msg *, msg, u32, start, sk_msg_iter_var_next(i); sg_unmark_end(psge); + sg_unmark_end(&rsge); sk_msg_iter_next(msg, end); } |