diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2016-11-03 09:42:36 -0700 |
|---|---|---|
| committer | Jeff Johnson <jjohnson@codeaurora.org> | 2018-05-03 14:03:24 -0700 |
| commit | 28307e7f246706589657f5cb5b07b54dad3994ad (patch) | |
| tree | a61a3f5a85d3c4737581c2bfc00bad46fd30df31 /kernel/taskstats.c | |
| parent | cebf59e49427f15f2dd8758a4039c37ff886ebce (diff) | |
taskstats: fix the length of cgroupstats_cmd_get_policy
cgroupstats_cmd_get_policy is [CGROUPSTATS_CMD_ATTR_MAX+1],
taskstats_cmd_get_policy[TASKSTATS_CMD_ATTR_MAX+1],
but their family.maxattr is TASKSTATS_CMD_ATTR_MAX.
CGROUPSTATS_CMD_ATTR_MAX is less than TASKSTATS_CMD_ATTR_MAX,
so we could end up accessing out-of-bound.
Change cgroupstats_cmd_get_policy to TASKSTATS_CMD_ATTR_MAX+1,
this is safe because the rest are initialized to 0's.
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-commit: 243d52126184b072a18fe2130ce0008f8aa3a340
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: Ie03c41de881d8e0e88ba35f5369e4e955d8d8682
CRs-Fixed: 2234354
Signed-off-by: Jeff Johnson <jjohnson@codeaurora.org>
Diffstat (limited to 'kernel/taskstats.c')
| -rw-r--r-- | kernel/taskstats.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/taskstats.c b/kernel/taskstats.c index 21f82c29c914..11cc757795cd 100644 --- a/kernel/taskstats.c +++ b/kernel/taskstats.c @@ -54,7 +54,11 @@ static const struct nla_policy taskstats_cmd_get_policy[TASKSTATS_CMD_ATTR_MAX+1 [TASKSTATS_CMD_ATTR_REGISTER_CPUMASK] = { .type = NLA_STRING }, [TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK] = { .type = NLA_STRING },}; -static const struct nla_policy cgroupstats_cmd_get_policy[CGROUPSTATS_CMD_ATTR_MAX+1] = { +/* + * We have to use TASKSTATS_CMD_ATTR_MAX here, it is the maxattr in the family. + * Make sure they are always aligned. + */ +static const struct nla_policy cgroupstats_cmd_get_policy[TASKSTATS_CMD_ATTR_MAX+1] = { [CGROUPSTATS_CMD_ATTR_FD] = { .type = NLA_U32 }, }; |