6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Vitaliy Shevtsov <v.shevtsov@xxxxxxxxx>
[ 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@xxxxxxxxxxxxxxx
Signed-off-by: Vitaliy Shevtsov <v.shevtsov@xxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 aacc05ec00c2b..74791078fdebc 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);
--
2.43.0
