seq_file: constify seq_operations

Make all seq_operations structs const, to help mitigate against
revectoring user-triggerable function pointers.

This is derived from the grsecurity patch, although generated from scratch
because it's simpler than extracting the changes from there.

Signed-off-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 5 insertions, 5 deletions

diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 6bfc7eaebfda..8e9777b76405 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -146,7 +146,7 @@ static int ima_measurements_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations ima_measurments_seqops = {
+static const struct seq_operations ima_measurments_seqops = {
         .start = ima_measurements_start,
         .next = ima_measurements_next,
         .stop = ima_measurements_stop,
@@ -221,7 +221,7 @@ static int ima_ascii_measurements_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations ima_ascii_measurements_seqops = {
+static const struct seq_operations ima_ascii_measurements_seqops = {
         .start = ima_measurements_start,
         .next = ima_measurements_next,
         .stop = ima_measurements_stop,
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index f83a80980726..aeead7585093 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -187,7 +187,7 @@ static void load_seq_stop(struct seq_file *s, void *v)
         /* No-op */
 }
 
-static struct seq_operations load_seq_ops = {
+static const struct seq_operations load_seq_ops = {
         .start = load_seq_start,
         .next  = load_seq_next,
         .show  = load_seq_show,
@@ -503,7 +503,7 @@ static void cipso_seq_stop(struct seq_file *s, void *v)
         /* No-op */
 }
 
-static struct seq_operations cipso_seq_ops = {
+static const struct seq_operations cipso_seq_ops = {
         .start = cipso_seq_start,
         .stop  = cipso_seq_stop,
         .next  = cipso_seq_next,
@@ -697,7 +697,7 @@ static void netlbladdr_seq_stop(struct seq_file *s, void *v)
         /* No-op */
 }
 
-static struct seq_operations netlbladdr_seq_ops = {
+static const struct seq_operations netlbladdr_seq_ops = {
         .start = netlbladdr_seq_start,
         .stop  = netlbladdr_seq_stop,
         .next  = netlbladdr_seq_next,