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authorStephan Mueller <smueller@chronox.de>2017-11-10 13:20:55 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2017-11-24 13:23:39 +0800
commit7d2c3f54e6f646887d019faa45f35d6fe9fe82ce (patch)
tree216af0cc45030069ed6131e529e080718f9c57f7 /ipc
parent8e1fa89aa8bc2870009b4486644e4a58f2e2a4f5 (diff)
download96b-common-7d2c3f54e6f646887d019faa45f35d6fe9fe82ce.tar.gz
crypto: af_alg - remove locking in async callback
The code paths protected by the socket-lock do not use or modify the socket in a non-atomic fashion. The actions pertaining the socket do not even need to be handled as an atomic operation. Thus, the socket-lock can be safely ignored. This fixes a bug regarding scheduling in atomic as the callback function may be invoked in interrupt context. In addition, the sock_hold is moved before the AIO encrypt/decrypt operation to ensure that the socket is always present. This avoids a tiny race window where the socket is unprotected and yet used by the AIO operation. Finally, the release of resources for a crypto operation is moved into a common function of af_alg_free_resources. Cc: <stable@vger.kernel.org> Fixes: e870456d8e7c8 ("crypto: algif_skcipher - overhaul memory management") Fixes: d887c52d6ae43 ("crypto: algif_aead - overhaul memory management") Reported-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Tested-by: Romain Izard <romain.izard.pro@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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