[RFC PATCH v4 07/12] dm-verity: add bdev_setsecurity hook for dm-verity signature
From: Deven Bowers <hidden>
Date: 2020-07-17 23:10:59
Also in:
dm-devel, linux-block, linux-fsdevel, linux-integrity, lkml
Subsystem:
device-mapper (lvm), the rest · Maintainers:
Alasdair Kergon, Mike Snitzer, Mikulas Patocka, Benjamin Marzinski, Linus Torvalds
Add a security hook call to set a security property of a block_device in dm-verity with the results of a verified, signed root-hash. Signed-off-by: Deven Bowers <redacted> --- drivers/md/dm-verity-verify-sig.c | 7 +++++++ include/linux/device-mapper.h | 2 ++ 2 files changed, 9 insertions(+)
diff --git a/drivers/md/dm-verity-verify-sig.c b/drivers/md/dm-verity-verify-sig.c
index 27dac8aa2e5a..242e2421d3c8 100644
--- a/drivers/md/dm-verity-verify-sig.c
+++ b/drivers/md/dm-verity-verify-sig.c@@ -8,7 +8,10 @@ #include <linux/device-mapper.h> #include <linux/verification.h> #include <keys/user-type.h> +#include <linux/security.h> +#include <linux/list.h> #include <linux/module.h> +#include "dm-core.h" #include "dm-verity.h" #include "dm-verity-verify-sig.h"
@@ -182,6 +185,10 @@ int verity_verify_root_hash(const struct dm_verity *v) goto cleanup; sig_target->passed = true; + + ret = security_bdev_setsecurity(dm_table_get_md(v->ti->table)->bdev, + DM_VERITY_SIGNATURE_SEC_NAME, + v->sig->sig, v->sig->sig_size); cleanup: kfree(root_hash); return ret;
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 8750f2dc5613..02be0be21d38 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h@@ -624,4 +624,6 @@ static inline unsigned long to_bytes(sector_t n) return (n << SECTOR_SHIFT); } +#define DM_VERITY_SIGNATURE_SEC_NAME DM_NAME ".verity-sig" + #endif /* _LINUX_DEVICE_MAPPER_H */
--
2.27.0