[RFC PATCH v6 08/11] dm-verity: add bdev_setsecurity hook for root-hash
From: Deven Bowers <hidden>
Date: 2020-07-30 00:31:50
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 root-hash that was passed to device-mapper. Signed-off-by: Deven Bowers <redacted> --- 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