Add a security hook call to set a security property of a block_device in dm-verity with the root-hash that was verified to match the merkel-tree. Signed-off-by: Deven Bowers <deven.desai@xxxxxxxxxxxxxxxxxxx> --- drivers/md/dm-verity-target.c | 8 ++++++++ include/linux/device-mapper.h | 1 + 2 files changed, 9 insertions(+) diff --git a/drivers/md/dm-verity-target.c b/drivers/md/dm-verity-target.c index c507f3a4e237..225f67ab378d 100644 --- a/drivers/md/dm-verity-target.c +++ b/drivers/md/dm-verity-target.c @@ -16,8 +16,10 @@ #include "dm-verity.h" #include "dm-verity-fec.h" #include "dm-verity-verify-sig.h" +#include "dm-core.h" #include <linux/module.h> #include <linux/reboot.h> +#include <linux/security.h> #define DM_MSG_PREFIX "verity" @@ -530,6 +532,12 @@ static int verity_verify_io(struct dm_verity_io *io) return -EIO; } + r = security_bdev_setsecurity(dm_table_get_md(v->ti->table)->bdev, + DM_VERITY_ROOTHASH_SEC_NAME, + v->root_digest, v->digest_size); + if (unlikely(r < 0)) + return r; + /* * At this point, the merkel tree has finished validating. * if signature was specified, validate the signature here. diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 02be0be21d38..b82e8223d52a 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -625,5 +625,6 @@ static inline unsigned long to_bytes(sector_t n) } #define DM_VERITY_SIGNATURE_SEC_NAME DM_NAME ".verity-sig" +#define DM_VERITY_ROOTHASH_SEC_NAME DM_NAME ".verity-rh" #endif /* _LINUX_DEVICE_MAPPER_H */ -- 2.27.0
