From: Vitaliy Shevtsov v.shevtsov@maxima.ru

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=...

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[ 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 v.shevtsov@maxima.ru Reviewed-by: Christoph Hellwig hch@lst.de Reviewed-by: Hannes Reinecke hare@suse.de Signed-off-by: Keith Busch kbusch@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Li Huafei lihuafei1@huawei.com --- 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);