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

commit 07bfd9bdf5 upstream.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Herbert Xu 2019-11-19 17:41:31 +08:00 committed by Greg Kroah-Hartman
parent 9f6d555f58
commit 00d58d0b58
1 changed files with 2 additions and 1 deletions
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3
crypto/pcrypt.c
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@ -362,11 +362,12 @@ err:
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);
}
subsys_initcall(pcrypt_init);