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| author | Maxim Mikityanskiy <maximmi@mellanox.com> | 2020-11-26 01:18:10 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-26 04:31:06 +0300 |
| commit | 025cc2fb6a4e84e9a0552c0017dcd1c24b7ac7da (patch) | |
| tree | a5e744c9d95e149dfe038bff54488d6094b633e0 /include/net/tls.h | |
| parent | a060133c2058bcc5bf2f82e1135ce76b4bc9865b (diff) | |
| download | linux-025cc2fb6a4e84e9a0552c0017dcd1c24b7ac7da.tar.xz | |
net/tls: Protect from calling tls_dev_del for TLS RX twice
tls_device_offload_cleanup_rx doesn't clear tls_ctx->netdev after
calling tls_dev_del if TLX TX offload is also enabled. Clearing
tls_ctx->netdev gets postponed until tls_device_gc_task. It leaves a
time frame when tls_device_down may get called and call tls_dev_del for
RX one extra time, confusing the driver, which may lead to a crash.
This patch corrects this racy behavior by adding a flag to prevent
tls_device_down from calling tls_dev_del the second time.
Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure")
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://lore.kernel.org/r/20201125221810.69870-1-saeedm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net/tls.h')
| -rw-r--r-- | include/net/tls.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/tls.h b/include/net/tls.h index cf1473099453..2bdd802212fe 100644 --- a/include/net/tls.h +++ b/include/net/tls.h @@ -199,6 +199,12 @@ enum tls_context_flags { * to be atomic. */ TLS_TX_SYNC_SCHED = 1, + /* tls_dev_del was called for the RX side, device state was released, + * but tls_ctx->netdev might still be kept, because TX-side driver + * resources might not be released yet. Used to prevent the second + * tls_dev_del call in tls_device_down if it happens simultaneously. + */ + TLS_RX_DEV_CLOSED = 2, }; struct cipher_context { |