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authorMaxim Mikityanskiy <maximmi@mellanox.com>2020-11-26 01:18:10 +0300
committerJakub Kicinski <kuba@kernel.org>2020-11-26 04:31:06 +0300
commit025cc2fb6a4e84e9a0552c0017dcd1c24b7ac7da (patch)
treea5e744c9d95e149dfe038bff54488d6094b633e0 /include/net/tls.h
parenta060133c2058bcc5bf2f82e1135ce76b4bc9865b (diff)
downloadlinux-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.h6
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 {