crypto: api - Check spawn->alg under lock in crypto_drop_spawn

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commit 7db3b61b6b upstream.

We need to check whether spawn->alg is NULL under lock as otherwise
the algorithm could be removed from under us after we have checked
it and found it to be non-NULL.  This could cause us to remove the
spawn from a non-existent list.

Fixes: 7ede5a5ba5 ("crypto: api - Fix crypto_drop_spawn crash...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Herbert Xu 2019-12-06 13:55:17 +08:00 • committed by Greg Kroah-Hartman

parent cf803f0ec9

commit cd690312ce

1 changed files with 2 additions and 4 deletions

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crypto/algapi.c

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