kernel/taskstats.c: fix bogus nlmsg_free()
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 <bunk@kernel.org>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 354e74b..07e86a8 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -398,31 +398,31 @@
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));
+ if (!file)
+ return 0;
- rc = prepare_reply(info, CGROUPSTATS_CMD_NEW, &rep_skb,
- size);
- if (rc < 0)
- goto err;
+ size = nla_total_size(sizeof(struct cgroupstats));
- na = nla_reserve(rep_skb, CGROUPSTATS_TYPE_CGROUP_STATS,
- sizeof(struct cgroupstats));
- stats = nla_data(na);
- memset(stats, 0, sizeof(*stats));
+ rc = prepare_reply(info, CGROUPSTATS_CMD_NEW, &rep_skb,
+ size);
+ if (rc < 0)
+ goto err;
- rc = cgroupstats_build(stats, file->f_dentry);
- if (rc < 0)
- goto err;
+ na = nla_reserve(rep_skb, CGROUPSTATS_TYPE_CGROUP_STATS,
+ sizeof(struct cgroupstats));
+ stats = nla_data(na);
+ memset(stats, 0, sizeof(*stats));
- fput_light(file, fput_needed);
- return send_reply(rep_skb, info->snd_pid);
+ rc = cgroupstats_build(stats, file->f_dentry);
+ if (rc < 0) {
+ nlmsg_free(rep_skb);
+ goto err;
}
+ rc = send_reply(rep_skb, info->snd_pid);
+
err:
- if (file)
- fput_light(file, fput_needed);
- nlmsg_free(rep_skb);
+ fput_light(file, fput_needed);
return rc;
}