Add a security hook call to set a security property of a block_device in dm-verity with the root-hash that was passed to device-mapper. 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 9970488e67ed..44914668398d 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" @@ -1207,6 +1209,12 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv) ti->per_io_data_size = roundup(ti->per_io_data_size, __alignof__(struct dm_verity_io)); + r = security_bdev_setsecurity(dm_table_get_md(v->ti->table)->bdev, + DM_VERITY_ROOTHASH_SEC_NAME, + v->root_digest, v->digest_size); + if (r) + goto bad; + verity_verify_sig_opts_cleanup(&verify_args); return 0; diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index ab6b8eb0a150..e8ef887e4bae 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -626,5 +626,6 @@ 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
