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cgroups: Make sure the cgroup formatted correctly

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In case if something is broken in the kernel and
we get a format corrupted -- simply exit out with
error instead of strlen'ing nil string.

Also while at it -- add a comment about format.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov
2014-07-15 17:04:11 +04:00
committed by Pavel Emelyanov
parent 0f178a1f99
commit cd704e80ee
1 changed files with 12 additions and 0 deletions
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12
proc_parse.c
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@@ -1530,8 +1530,20 @@ int parse_task_cgroup(int pid, struct list_head *retl, unsigned int *n)
if (!ncc)
goto err;
/*
* Typical output (':' is a separator here)
*
* 4:cpu,cpuacct:/
* 3:cpuset:/
* 2:name=systemd:/user.slice/user-1000.slice/session-1.scope
*/
name = strchr(buf, ':') + 1;
path = strchr(name, ':');
if (!name || !path) {
pr_err("Failed parsing cgroup %s\n", buf);
xfree(ncc);
goto err;
}
e = strchr(name, '\n');
*path++ = '\0';
if (e)