diff options
| author | Michael Weiß <michael.weiss@aisec.fraunhofer.de> | 2021-09-04 11:59:30 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2021-10-27 16:54:37 -0400 |
| commit | 58d0f180bd91a02e92f7794601ff607f51fab131 (patch) | |
| tree | 4180ea9da92915c45cf7c089157c663fcc5f78e4 /drivers/md | |
| parent | 82bb85998cc9a3d26f6086c80fae7888db3b3fd9 (diff) | |
dm crypt: log aead integrity violations to audit subsystem
Since dm-crypt target can be stacked on dm-integrity targets to
provide authenticated encryption, integrity violations are recognized
here during aead computation. We use the dm-audit submodule to
signal those events to user space, too.
The construction and destruction of crypt device mappings are also
logged as audit events.
Signed-off-by: Michael Weiß <michael.weiss@aisec.fraunhofer.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-crypt.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 916b7da16de2..5c56d2b66d52 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -41,6 +41,8 @@ #include <linux/device-mapper.h> +#include "dm-audit.h" + #define DM_MSG_PREFIX "crypt" /* @@ -1362,8 +1364,12 @@ static int crypt_convert_block_aead(struct crypt_config *cc, if (r == -EBADMSG) { char b[BDEVNAME_SIZE]; - DMERR_LIMIT("%s: INTEGRITY AEAD ERROR, sector %llu", bio_devname(ctx->bio_in, b), - (unsigned long long)le64_to_cpu(*sector)); + sector_t s = le64_to_cpu(*sector); + + DMERR_LIMIT("%s: INTEGRITY AEAD ERROR, sector %llu", + bio_devname(ctx->bio_in, b), s); + dm_audit_log_bio(DM_MSG_PREFIX, "integrity-aead", + ctx->bio_in, s, 0); } if (!r && cc->iv_gen_ops && cc->iv_gen_ops->post) @@ -2173,8 +2179,12 @@ static void kcryptd_async_done(struct crypto_async_request *async_req, if (error == -EBADMSG) { char b[BDEVNAME_SIZE]; - DMERR_LIMIT("%s: INTEGRITY AEAD ERROR, sector %llu", bio_devname(ctx->bio_in, b), - (unsigned long long)le64_to_cpu(*org_sector_of_dmreq(cc, dmreq))); + sector_t s = le64_to_cpu(*org_sector_of_dmreq(cc, dmreq)); + + DMERR_LIMIT("%s: INTEGRITY AEAD ERROR, sector %llu", + bio_devname(ctx->bio_in, b), s); + dm_audit_log_bio(DM_MSG_PREFIX, "integrity-aead", + ctx->bio_in, s, 0); io->error = BLK_STS_PROTECTION; } else if (error < 0) io->error = BLK_STS_IOERR; @@ -2734,6 +2744,8 @@ static void crypt_dtr(struct dm_target *ti) dm_crypt_clients_n--; crypt_calculate_pages_per_client(); spin_unlock(&dm_crypt_clients_lock); + + dm_audit_log_dtr(DM_MSG_PREFIX, ti, 1); } static int crypt_ctr_ivmode(struct dm_target *ti, const char *ivmode) @@ -3362,9 +3374,11 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->num_flush_bios = 1; ti->limit_swap_bios = true; + dm_audit_log_ctr(DM_MSG_PREFIX, ti, 1); return 0; bad: + dm_audit_log_ctr(DM_MSG_PREFIX, ti, 0); crypt_dtr(ti); return ret; } |