We'd better not nlmsg_free on a pointer containing an undefined value
(and without having anything allocated)...
Spotted by the Coverity checker.
Signed-off-by: Adrian Bunk <[email protected]>
---
kernel/taskstats.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- linux-2.6/kernel/taskstats.c.old 2007-10-23 19:01:07.000000000 +0200
+++ linux-2.6/kernel/taskstats.c 2007-10-23 19:21:54.000000000 +0200
@@ -383,67 +383,67 @@
static int cgroupstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
{
int rc = 0;
struct sk_buff *rep_skb;
struct cgroupstats *stats;
struct nlattr *na;
size_t size;
u32 fd;
struct file *file;
int fput_needed;
na = info->attrs[CGROUPSTATS_CMD_ATTR_FD];
if (!na)
return -EINVAL;
fd = nla_get_u32(info->attrs[CGROUPSTATS_CMD_ATTR_FD]);
file = fget_light(fd, &fput_needed);
if (file) {
size = nla_total_size(sizeof(struct cgroupstats));
rc = prepare_reply(info, CGROUPSTATS_CMD_NEW, &rep_skb,
size);
if (rc < 0)
- goto err;
+ return rc;
na = nla_reserve(rep_skb, CGROUPSTATS_TYPE_CGROUP_STATS,
sizeof(struct cgroupstats));
stats = nla_data(na);
memset(stats, 0, sizeof(*stats));
rc = cgroupstats_build(stats, file->f_dentry);
+
+ fput_light(file, fput_needed);
+
if (rc < 0)
goto err;
- fput_light(file, fput_needed);
return send_reply(rep_skb, info->snd_pid);
+err:
+ nlmsg_free(rep_skb);
}
-err:
- if (file)
- fput_light(file, fput_needed);
- nlmsg_free(rep_skb);
return rc;
}
static int taskstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
{
int rc = 0;
struct sk_buff *rep_skb;
struct taskstats *stats;
size_t size;
cpumask_t mask;
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], &mask);
if (rc < 0)
return rc;
if (rc == 0)
return add_del_listener(info->snd_pid, &mask, REGISTER);
rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], &mask);
if (rc < 0)
return rc;
if (rc == 0)
return add_del_listener(info->snd_pid, &mask, DEREGISTER);
/*
-
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