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>

26 files changed, 49 insertions, 49 deletions

diff --git a/arch/mn10300/kernel/setup.c b/arch/mn10300/kernel/setup.c
index 79890edfd67a..3f24c298a3af 100644
--- a/arch/mn10300/kernel/setup.c
+++ b/arch/mn10300/kernel/setup.c
@@ -285,7 +285,7 @@ static void c_stop(struct seq_file *m, void *v)
 {
 }
 
-struct seq_operations cpuinfo_op = {
+const struct seq_operations cpuinfo_op = {
         .start  = c_start,
         .next   = c_next,
         .stop   = c_stop,
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 02fed27af7f6..1d5570a1e456 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -328,7 +328,7 @@ static void c_stop(struct seq_file *m, void *v)
 {
 }
 
-struct seq_operations cpuinfo_op = {
+const struct seq_operations cpuinfo_op = {
         .start =c_start,
         .next = c_next,
         .stop = c_stop,
diff --git a/arch/powerpc/platforms/pseries/hvCall_inst.c b/arch/powerpc/platforms/pseries/hvCall_inst.c
index eae51ef9af24..3631a4f277eb 100644
--- a/arch/powerpc/platforms/pseries/hvCall_inst.c
+++ b/arch/powerpc/platforms/pseries/hvCall_inst.c
@@ -71,7 +71,7 @@ static int hc_show(struct seq_file *m, void *p)
         return 0;
 }
 
-static struct seq_operations hcall_inst_seq_ops = {
+static const struct seq_operations hcall_inst_seq_ops = {
         .start = hc_start,
         .next  = hc_next,
         .stop  = hc_stop,
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 4f19105f755c..24c3e21ab263 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -363,7 +363,7 @@ static void cciss_seq_stop(struct seq_file *seq, void *v)
         h->busy_configuring = 0;
 }
 
-static struct seq_operations cciss_seq_ops = {
+static const struct seq_operations cciss_seq_ops = {
         .start = cciss_seq_start,
         .show  = cciss_seq_show,
         .next  = cciss_seq_next,
diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index 1ee27cc23426..07fa612a58d5 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -91,7 +91,7 @@ static int misc_seq_show(struct seq_file *seq, void *v)
 }
 
 
-static struct seq_operations misc_seq_ops = {
+static const struct seq_operations misc_seq_ops = {
         .start = misc_seq_start,
         .next  = misc_seq_next,
         .stop  = misc_seq_stop,
diff --git a/drivers/char/tpm/tpm_bios.c b/drivers/char/tpm/tpm_bios.c
index 0c2f55a38b95..bf2170fb1cdd 100644
--- a/drivers/char/tpm/tpm_bios.c
+++ b/drivers/char/tpm/tpm_bios.c
@@ -343,14 +343,14 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations tpm_ascii_b_measurments_seqops = {
+static const struct seq_operations tpm_ascii_b_measurments_seqops = {
         .start = tpm_bios_measurements_start,
         .next = tpm_bios_measurements_next,
         .stop = tpm_bios_measurements_stop,
         .show = tpm_ascii_bios_measurements_show,
 };
 
-static struct seq_operations tpm_binary_b_measurments_seqops = {
+static const struct seq_operations tpm_binary_b_measurments_seqops = {
         .start = tpm_bios_measurements_start,
         .next = tpm_bios_measurements_next,
         .stop = tpm_bios_measurements_stop,
diff --git a/drivers/isdn/capi/kcapi_proc.c b/drivers/isdn/capi/kcapi_proc.c
index 50ed778f63fc..09d4db764d22 100644
--- a/drivers/isdn/capi/kcapi_proc.c
+++ b/drivers/isdn/capi/kcapi_proc.c
@@ -89,14 +89,14 @@ static int contrstats_show(struct seq_file *seq, void *v)
         return 0;
 }
 
-static struct seq_operations seq_controller_ops = {
+static const struct seq_operations seq_controller_ops = {
         .start  = controller_start,
         .next   = controller_next,
         .stop   = controller_stop,
         .show   = controller_show,
 };
 
-static struct seq_operations seq_contrstats_ops = {
+static const struct seq_operations seq_contrstats_ops = {
         .start  = controller_start,
         .next   = controller_next,
         .stop   = controller_stop,
@@ -194,14 +194,14 @@ applstats_show(struct seq_file *seq, void *v)
         return 0;
 }
 
-static struct seq_operations seq_applications_ops = {
+static const struct seq_operations seq_applications_ops = {
         .start  = applications_start,
         .next   = applications_next,
         .stop   = applications_stop,
         .show   = applications_show,
 };
 
-static struct seq_operations seq_applstats_ops = {
+static const struct seq_operations seq_applstats_ops = {
         .start  = applications_start,
         .next   = applications_next,
         .stop   = applications_stop,
@@ -264,7 +264,7 @@ static int capi_driver_show(struct seq_file *seq, void *v)
         return 0;
 }
 
-static struct seq_operations seq_capi_driver_ops = {
+static const struct seq_operations seq_capi_driver_ops = {
         .start  = capi_driver_start,
         .next   = capi_driver_next,
         .stop   = capi_driver_stop,
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 4968c4ced385..848b59466850 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -2233,7 +2233,7 @@ static struct file_operations dev_fops = {
         .open = sg_proc_open_dev,
         .release = seq_release,
 };
-static struct seq_operations dev_seq_ops = {
+static const struct seq_operations dev_seq_ops = {
         .start = dev_seq_start,
         .next  = dev_seq_next,
         .stop  = dev_seq_stop,
@@ -2246,7 +2246,7 @@ static struct file_operations devstrs_fops = {
         .open = sg_proc_open_devstrs,
         .release = seq_release,
 };
-static struct seq_operations devstrs_seq_ops = {
+static const struct seq_operations devstrs_seq_ops = {
         .start = dev_seq_start,
         .next  = dev_seq_next,
         .stop  = dev_seq_stop,
@@ -2259,7 +2259,7 @@ static struct file_operations debug_fops = {
         .open = sg_proc_open_debug,
         .release = seq_release,
 };
-static struct seq_operations debug_seq_ops = {
+static const struct seq_operations debug_seq_ops = {
         .start = dev_seq_start,
         .next  = dev_seq_next,
         .stop  = dev_seq_stop,
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 8630615e57fe..852739d262a9 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -28,7 +28,7 @@ static int afs_proc_cells_show(struct seq_file *m, void *v);
 static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
                                     size_t size, loff_t *_pos);
 
-static struct seq_operations afs_proc_cells_ops = {
+static const struct seq_operations afs_proc_cells_ops = {
         .start  = afs_proc_cells_start,
         .next   = afs_proc_cells_next,
         .stop   = afs_proc_cells_stop,
@@ -70,7 +70,7 @@ static void *afs_proc_cell_volumes_next(struct seq_file *p, void *v,
 static void afs_proc_cell_volumes_stop(struct seq_file *p, void *v);
 static int afs_proc_cell_volumes_show(struct seq_file *m, void *v);
 
-static struct seq_operations afs_proc_cell_volumes_ops = {
+static const struct seq_operations afs_proc_cell_volumes_ops = {
         .start  = afs_proc_cell_volumes_start,
         .next   = afs_proc_cell_volumes_next,
         .stop   = afs_proc_cell_volumes_stop,
@@ -95,7 +95,7 @@ static void *afs_proc_cell_vlservers_next(struct seq_file *p, void *v,
 static void afs_proc_cell_vlservers_stop(struct seq_file *p, void *v);
 static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v);
 
-static struct seq_operations afs_proc_cell_vlservers_ops = {
+static const struct seq_operations afs_proc_cell_vlservers_ops = {
         .start  = afs_proc_cell_vlservers_start,
         .next   = afs_proc_cell_vlservers_next,
         .stop   = afs_proc_cell_vlservers_stop,
@@ -119,7 +119,7 @@ static void *afs_proc_cell_servers_next(struct seq_file *p, void *v,
 static void afs_proc_cell_servers_stop(struct seq_file *p, void *v);
 static int afs_proc_cell_servers_show(struct seq_file *m, void *v);
 
-static struct seq_operations afs_proc_cell_servers_ops = {
+static const struct seq_operations afs_proc_cell_servers_ops = {
         .start  = afs_proc_cell_servers_start,
         .next   = afs_proc_cell_servers_next,
         .stop   = afs_proc_cell_servers_stop,
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 1d1d27442235..1c8bb8c3a82e 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -386,9 +386,9 @@ static int table_seq_show(struct seq_file *seq, void *iter_ptr)
         return rv;
 }
 
-static struct seq_operations format1_seq_ops;
-static struct seq_operations format2_seq_ops;
-static struct seq_operations format3_seq_ops;
+static const struct seq_operations format1_seq_ops;
+static const struct seq_operations format2_seq_ops;
+static const struct seq_operations format3_seq_ops;
 
 static void *table_seq_start(struct seq_file *seq, loff_t *pos)
 {
@@ -534,21 +534,21 @@ static void table_seq_stop(struct seq_file *seq, void *iter_ptr)
         }
 }
 
-static struct seq_operations format1_seq_ops = {
+static const struct seq_operations format1_seq_ops = {
         .start = table_seq_start,
         .next  = table_seq_next,
         .stop  = table_seq_stop,
         .show  = table_seq_show,
 };
 
-static struct seq_operations format2_seq_ops = {
+static const struct seq_operations format2_seq_ops = {
         .start = table_seq_start,
         .next  = table_seq_next,
         .stop  = table_seq_stop,
         .show  = table_seq_show,
 };
 
-static struct seq_operations format3_seq_ops = {
+static const struct seq_operations format3_seq_ops = {
         .start = table_seq_start,
         .next  = table_seq_next,
         .stop  = table_seq_stop,
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index a8a358bc0f21..53b86e16e5fe 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -768,7 +768,7 @@ static void jbd2_seq_history_stop(struct seq_file *seq, void *v)
 {
 }
 
-static struct seq_operations jbd2_seq_history_ops = {
+static const struct seq_operations jbd2_seq_history_ops = {
         .start  = jbd2_seq_history_start,
         .next   = jbd2_seq_history_next,
         .stop   = jbd2_seq_history_stop,
@@ -872,7 +872,7 @@ static void jbd2_seq_info_stop(struct seq_file *seq, void *v)
 {
 }
 
-static struct seq_operations jbd2_seq_info_ops = {
+static const struct seq_operations jbd2_seq_info_ops = {
         .start  = jbd2_seq_info_start,
         .next   = jbd2_seq_info_next,
         .stop   = jbd2_seq_info_stop,
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index a7ce15d3c248..152025358dad 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -1531,7 +1531,7 @@ static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
 static void nfs_server_list_stop(struct seq_file *p, void *v);
 static int nfs_server_list_show(struct seq_file *m, void *v);
 
-static struct seq_operations nfs_server_list_ops = {
+static const struct seq_operations nfs_server_list_ops = {
         .start  = nfs_server_list_start,
         .next   = nfs_server_list_next,
         .stop   = nfs_server_list_stop,
@@ -1552,7 +1552,7 @@ static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
 static void nfs_volume_list_stop(struct seq_file *p, void *v);
 static int nfs_volume_list_show(struct seq_file *m, void *v);
 
-static struct seq_operations nfs_volume_list_ops = {
+static const struct seq_operations nfs_volume_list_ops = {
         .start  = nfs_volume_list_start,
         .next   = nfs_volume_list_next,
         .stop   = nfs_volume_list_stop,
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 984a5ebcc1d6..c1c9e035d4a4 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1517,7 +1517,7 @@ static int e_show(struct seq_file *m, void *p)
         return svc_export_show(m, &svc_export_cache, cp);
 }
 
-struct seq_operations nfs_exports_op = {
+const struct seq_operations nfs_exports_op = {
         .start  = e_start,
         .next   = e_next,
         .stop   = e_stop,
diff --git a/fs/ocfs2/cluster/netdebug.c b/fs/ocfs2/cluster/netdebug.c
index f8424874fa07..cfb2be708abe 100644
--- a/fs/ocfs2/cluster/netdebug.c
+++ b/fs/ocfs2/cluster/netdebug.c
@@ -163,7 +163,7 @@ static void nst_seq_stop(struct seq_file *seq, void *v)
 {
 }
 
-static struct seq_operations nst_seq_ops = {
+static const struct seq_operations nst_seq_ops = {
         .start = nst_seq_start,
         .next = nst_seq_next,
         .stop = nst_seq_stop,
@@ -344,7 +344,7 @@ static void sc_seq_stop(struct seq_file *seq, void *v)
 {
 }
 
-static struct seq_operations sc_seq_ops = {
+static const struct seq_operations sc_seq_ops = {
         .start = sc_seq_start,
         .next = sc_seq_next,
         .stop = sc_seq_stop,
diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c
index df52f706f669..c5c88124096d 100644
--- a/fs/ocfs2/dlm/dlmdebug.c
+++ b/fs/ocfs2/dlm/dlmdebug.c
@@ -683,7 +683,7 @@ static int lockres_seq_show(struct seq_file *s, void *v)
         return 0;
 }
 
-static struct seq_operations debug_lockres_ops = {
+static const struct seq_operations debug_lockres_ops = {
         .start =        lockres_seq_start,
         .stop =         lockres_seq_stop,
         .next =         lockres_seq_next,
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index 7e14d1a04001..9fe7d7ebe115 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -109,7 +109,7 @@ static void *nommu_region_list_next(struct seq_file *m, void *v, loff_t *pos)
         return rb_next((struct rb_node *) v);
 }
 
-static struct seq_operations proc_nommu_region_list_seqop = {
+static const struct seq_operations proc_nommu_region_list_seqop = {
         .start  = nommu_region_list_start,
         .next   = nommu_region_list_next,
         .stop   = nommu_region_list_stop,
diff --git a/include/linux/nfsd/nfsd.h b/include/linux/nfsd/nfsd.h
index 03bbe9039104..510ffdd5020e 100644
--- a/include/linux/nfsd/nfsd.h
+++ b/include/linux/nfsd/nfsd.h
@@ -60,7 +60,7 @@ extern spinlock_t		nfsd_drc_lock;
 extern unsigned int             nfsd_drc_max_mem;
 extern unsigned int             nfsd_drc_mem_used;
 
-extern struct seq_operations nfs_exports_op;
+extern const struct seq_operations nfs_exports_op;
 
 /*
  * Function prototypes.
diff --git a/ipc/util.c b/ipc/util.c
index b8e4ba92f6d1..79ce84e890f7 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -942,7 +942,7 @@ static int sysvipc_proc_show(struct seq_file *s, void *it)
         return iface->show(s, it);
 }
 
-static struct seq_operations sysvipc_proc_seqops = {
+static const struct seq_operations sysvipc_proc_seqops = {
         .start = sysvipc_proc_start,
         .stop  = sysvipc_proc_stop,
         .next  = sysvipc_proc_next,
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 213b7f92fcdd..cd83d9933b6b 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2314,7 +2314,7 @@ static int cgroup_tasks_show(struct seq_file *s, void *v)
         return seq_printf(s, "%d\n", *(int *)v);
 }
 
-static struct seq_operations cgroup_tasks_seq_operations = {
+static const struct seq_operations cgroup_tasks_seq_operations = {
         .start = cgroup_tasks_start,
         .stop = cgroup_tasks_stop,
         .next = cgroup_tasks_next,
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index ef177d653b2c..cfadc1291d0b 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1321,7 +1321,7 @@ static int __kprobes show_kprobe_addr(struct seq_file *pi, void *v)
         return 0;
 }
 
-static struct seq_operations kprobes_seq_ops = {
+static const struct seq_operations kprobes_seq_ops = {
         .start = kprobe_seq_start,
         .next  = kprobe_seq_next,
         .stop  = kprobe_seq_stop,
diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index d4b3dbc79fdb..d4aba4f3584c 100644
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -594,7 +594,7 @@ static int ls_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations lockstat_ops = {
+static const struct seq_operations lockstat_ops = {
         .start  = ls_start,
         .next   = ls_next,
         .stop   = ls_stop,
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index c71e91bf7372..23df7771c937 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1520,7 +1520,7 @@ static int t_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations show_ftrace_seq_ops = {
+static const struct seq_operations show_ftrace_seq_ops = {
         .start = t_start,
         .next = t_next,
         .stop = t_stop,
@@ -2459,7 +2459,7 @@ static int g_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations ftrace_graph_seq_ops = {
+static const struct seq_operations ftrace_graph_seq_ops = {
         .start = g_start,
         .next = g_next,
         .stop = g_stop,
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a35925d222ba..6c0f6a8a22eb 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1949,7 +1949,7 @@ static int s_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations tracer_seq_ops = {
+static const struct seq_operations tracer_seq_ops = {
         .start          = s_start,
         .next           = s_next,
         .stop           = s_stop,
@@ -2163,7 +2163,7 @@ static int t_show(struct seq_file *m, void *v)
         return 0;
 }
 
-static struct seq_operations show_traces_seq_ops = {
+static const struct seq_operations show_traces_seq_ops = {
         .start          = t_start,
         .next           = t_next,
         .stop           = t_stop,
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 3907510c2ce3..090675e269ee 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -324,7 +324,7 @@ static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
         return 0;
 }
 
-static struct seq_operations ipmr_mfc_seq_ops = {
+static const struct seq_operations ipmr_mfc_seq_ops = {
         .start = ipmr_mfc_seq_start,
         .next  = ipmr_mfc_seq_next,
         .stop  = ipmr_mfc_seq_stop,
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,