diff options
| author | KAMEZAWA Hiroyuki <[email protected]> | 2009-11-11 14:26:26 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2009-11-12 07:25:56 -0800 |
| commit | e00e431612c3a6e437a01f2129fd3843da0c982a (patch) | |
| tree | 4f838123d0b295ab3608380ce803c8960a8ebfd0 /lib/cpu-notifier-error-inject.c | |
| parent | b9f9d4706cb1b706f89f98ea6ead41ebecdefbc2 (diff) | |
memcg: fix wrong pointer initialization at page migration when memcg is disabled.
Lee Schermerhorn reported that he saw bad pointer dereference in
mem_cgroup_end_migration() when he disabled memcg by boot option.
memcg's page migration logic works as
mem_cgroup_prepare_migration(page, &ptr);
do page migration
mem_cgroup_end_migration(page, ptr);
Now, ptr is not initialized in prepare_migration when memcg is disabled
by boot option. This causes panic in end_migration. This patch fixes it.
Reported-by: Lee Schermerhorn <[email protected]>
Cc: Balbir Singh <[email protected]>
Signed-off-by: KAMEZAWA Hiroyuki <[email protected]>
Reviewed-by: Daisuke Nishimura <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/cpu-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions