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| author | Jann Horn <jannh@google.com> | 2018-10-26 15:09:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 16:26:35 -0700 |
| commit | f0ecf25a093fc0589f0a6bc4c1ea068bbb67d220 (patch) | |
| tree | c4e24a9159ff065e6f9cafe95743610ebd7f2d1b /mm/vmstat.c | |
| parent | ff09d7ec9786be4ad7589aa987d7dc66e2dd9160 (diff) | |
| download | lwn-f0ecf25a093fc0589f0a6bc4c1ea068bbb67d220.tar.gz lwn-f0ecf25a093fc0589f0a6bc4c1ea068bbb67d220.zip | |
mm/vmstat.c: assert that vmstat_text is in sync with stat_items_size
Having two gigantic arrays that must manually be kept in sync, including
ifdefs, isn't exactly robust. To make it easier to catch such issues in
the future, add a BUILD_BUG_ON().
Link: http://lkml.kernel.org/r/20181001143138.95119-3-jannh@google.com
Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Kemi Wang <kemi.wang@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmstat.c')
| -rw-r--r-- | mm/vmstat.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index dab53430f63c..6038ce593ce3 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1665,6 +1665,8 @@ static void *vmstat_start(struct seq_file *m, loff_t *pos) stat_items_size += sizeof(struct vm_event_state); #endif + BUILD_BUG_ON(stat_items_size != + ARRAY_SIZE(vmstat_text) * sizeof(unsigned long)); v = kmalloc(stat_items_size, GFP_KERNEL); m->private = v; if (!v) |