From 9b8c42581f0e451ecf0b59f0312a2cb601d4e80d Mon Sep 17 00:00:00 2001 From: Vitaliy Shevtsov Date: Tue, 12 Nov 2024 00:21:46 +0800 Subject: [PATCH] nvmet-auth: assign dh_key to NULL after kfree_sensitive stable inclusion from stable-v6.6.60 commit c60af16e1d6cc2237d58336546d6adfc067b6b8f category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IB37AJ CVE: CVE-2024-50215 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c60af16e1d6cc2237d58336546d6adfc067b6b8f -------------------------------- [ Upstream commit d2f551b1f72b4c508ab9298419f6feadc3b5d791 ] ctrl->dh_key might be used across multiple calls to nvmet_setup_dhgroup() for the same controller. So it's better to nullify it after release on error path in order to avoid double free later in nvmet_destroy_auth(). Found by Linux Verification Center (linuxtesting.org) with Svace. Fixes: 7a277c37d352 ("nvmet-auth: Diffie-Hellman key exchange support") Cc: stable@vger.kernel.org Signed-off-by: Vitaliy Shevtsov Reviewed-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Signed-off-by: Keith Busch Signed-off-by: Sasha Levin Signed-off-by: Li Huafei --- drivers/nvme/target/auth.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/nvme/target/auth.c b/drivers/nvme/target/auth.c index aacc05ec00c2..74791078fdeb 100644 --- a/drivers/nvme/target/auth.c +++ b/drivers/nvme/target/auth.c @@ -101,6 +101,7 @@ int nvmet_setup_dhgroup(struct nvmet_ctrl *ctrl, u8 dhgroup_id) pr_debug("%s: ctrl %d failed to generate private key, err %d\n", __func__, ctrl->cntlid, ret); kfree_sensitive(ctrl->dh_key); + ctrl->dh_key = NULL; return ret; } ctrl->dh_keysize = crypto_kpp_maxsize(ctrl->dh_tfm); -- Gitee