Re: [PATCH v20 12/20] dm verity: expose root hash digest and signature data to LSMs

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On 8/18/2024 10:22 AM, Paul Moore wrote:
On Fri, Aug 16, 2024 at 3:11 PM Fan Wu <wufan@xxxxxxxxxxxxxxxxxxx> wrote:
On 8/16/2024 6:35 AM, Mikulas Patocka wrote:

...


+#ifdef CONFIG_SECURITY
+     u8 *root_digest_sig;    /* signature of the root digest */
+#endif /* CONFIG_SECURITY */
        unsigned int salt_size;
        sector_t data_start;    /* data offset in 512-byte sectors */
        sector_t hash_start;    /* hash start in blocks */
@@ -58,6 +61,9 @@ struct dm_verity {
        bool hash_failed:1;     /* set if hash of any block failed */
        bool use_bh_wq:1;       /* try to verify in BH wq before normal work-queue */
        unsigned int digest_size;       /* digest size for the current hash algorithm */
+#ifdef CONFIG_SECURITY
+     unsigned int sig_size;  /* root digest signature size */
+#endif /* CONFIG_SECURITY */
        unsigned int hash_reqsize; /* the size of temporary space for crypto */
        enum verity_mode mode;  /* mode for handling verification errors */
        unsigned int corrupted_errs;/* Number of errors for corrupted blocks */

Just nit-picking: I would move "unsigned int sig_size" up, after "u8
*root_digest_sig" entry.

Mikulas

Sure, I can make these two fields together.

Fan, do you want me to move the @sig_size field when merging or are
you planning to submit another revision?  I'm happy to do it during
the merge, but I don't want to bother if you are going to post another
patchset.


Thanks, Paul. It seems moving the field during the merge can expedite the process. Please go ahead with that. I appreciate your help with this!

-Fan




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