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| author |   Jakub Kicinski <jakub.kicinski@netronome.com> | 2019-11-27 12:16:39 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-11-28 22:40:29 -0800 |
| commit | c329ef9684de9517d82af5b4758c9e1b64a8a11a (patch) | |
| tree | a4f623037c5505b26a1a70e01786352308b6a5cd /net/tls | |
| parent | Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux; tag 'dma-mapping-5.5' of git://git.infradead.org/users/hch/dma-mapping (diff) | |
| download | wireguard-linux-c329ef9684de9517d82af5b4758c9e1b64a8a11a.tar.xz wireguard-linux-c329ef9684de9517d82af5b4758c9e1b64a8a11a.zip | |
net/tls: take into account that bpf_exec_tx_verdict() may free the record
bpf_exec_tx_verdict() may free the record if tls_push_record()
fails, or if the entire record got consumed by BPF. Re-check
ctx->open_rec before touching the data.
Fixes: d3b18ad31f93 ("tls: add bpf support to sk_msg handling")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tls')
| -rw-r--r-- | net/tls/tls_sw.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index da9f9ce51e7b..70e3c0c1af50 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -984,7 +984,7 @@ alloc_encrypted: num_async++; else if (ret == -ENOMEM) goto wait_for_memory; - else if (ret == -ENOSPC) + else if (ctx->open_rec && ret == -ENOSPC) goto rollback_iter; else if (ret != -EAGAIN) goto send_end; @@ -1053,11 +1053,12 @@ wait_for_memory: ret = sk_stream_wait_memory(sk, &timeo); if (ret) { trim_sgl: - tls_trim_both_msgs(sk, orig_size); + if (ctx->open_rec) + tls_trim_both_msgs(sk, orig_size); goto send_end; } - if (msg_en->sg.size < required_size) + if (ctx->open_rec && msg_en->sg.size < required_size) goto alloc_encrypted; } @@ -1190,11 +1191,13 @@ wait_for_sndbuf: wait_for_memory: ret = sk_stream_wait_memory(sk, &timeo); if (ret) { - tls_trim_both_msgs(sk, msg_pl->sg.size); + if (ctx->open_rec) + tls_trim_both_msgs(sk, msg_pl->sg.size); goto sendpage_end; } - goto alloc_payload; + if (ctx->open_rec) + goto alloc_payload; } if (num_async) { |