The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 07bfd9bdf568a38d9440c607b72342036011f727 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 19 Nov 2019 17:41:31 +0800
Subject: [PATCH] crypto: pcrypt - Fix user-after-free on module unload
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: 5068c7a883d1 ("crypto: pcrypt - Add pcrypt crypto...")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c
index 543792e0ebf0..81bbea7f2ba6 100644
--- a/crypto/pcrypt.c
+++ b/crypto/pcrypt.c
@@ -362,11 +362,12 @@ 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);
}
subsys_initcall(pcrypt_init);
