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crypto: pcrypt - Fix user-after-free on module unload

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[ Upstream commit 07bfd9bdf568a38d9440c607b72342036011f727 ]

On module unload of pcrypt we must unregister the crypto algorithms
first and then tear down the padata structure.  As otherwise the
crypto algorithms are still alive and can be used while the padata
structure is being freed.

Fixes: 5068c7a883 ("crypto: pcrypt - Add pcrypt crypto...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Herbert Xu 2019-11-19 17:41:31 +08:00 committed by Greg Kroah-Hartman
parent e3f5c2e990
commit db4d8e42ec
1 changed files with 2 additions and 1 deletions
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3
crypto/pcrypt.c
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@ -505,11 +505,12 @@ static int __init pcrypt_init(void)
static void __exit pcrypt_exit(void)
{
crypto_unregister_template(&pcrypt_tmpl);
pcrypt_fini_padata(&pencrypt);
pcrypt_fini_padata(&pdecrypt);
kset_unregister(pcrypt_kset);
crypto_unregister_template(&pcrypt_tmpl);
}
module_init(pcrypt_init);