ima: Replace zero-length array with flexible-array

There is a regular need in the kernel to provide a way to declare having a
dynamically sized set of trailing elements in a structure. Kernel code should
always use “flexible array members”[1] for these cases. The older style of
one-element or zero-length arrays should no longer be used[2].

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://github.com/KSPP/linux/issues/21

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
index 298b737..16c1894 100644 (file)
--- a/security/integrity/integrity.h
+++ b/security/integrity/integrity.h
@@ -107,7 +107,7 @@ struct ima_digest_data {
                } ng;
                u8 data[2];
        } xattr;
-       u8 digest[0];
+       u8 digest[];
 } __packed;
 
 /*
@@ -119,7 +119,7 @@ struct signature_v2_hdr {
        uint8_t hash_algo;      /* Digest algorithm [enum hash_algo] */
        __be32 keyid;           /* IMA key identifier - not X509/PGP specific */
        __be16 sig_size;        /* signature size */
-       uint8_t sig[0];         /* signature payload */
+       uint8_t sig[];          /* signature payload */
 } __packed;
 
 /* integrity data associated with an inode */