From 679a5e3f12830392d14f94b04bbe0f3cabdbd773 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Thu, 29 Sep 2016 11:58:36 +0200 Subject: cpuset: fix error handling regression in proc_cpuset_show() 4c737b41de7f ("cgroup: make cgroup_path() and friends behave in the style of strlcpy()") botched the conversion of proc_cpuset_show() and broke its error handling. It made the function return 0 on failures and fail to handle error returns from cgroup_path_ns(). Fix it. Reported-by: Dan Carpenter Signed-off-by: Tejun Heo --- kernel/cpuset.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'kernel/cpuset.c') diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 793ae6fd96dc..97dd8e178786 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -2698,12 +2698,13 @@ int proc_cpuset_show(struct seq_file *m, struct pid_namespace *ns, if (!buf) goto out; - retval = -ENAMETOOLONG; css = task_get_css(tsk, cpuset_cgrp_id); retval = cgroup_path_ns(css->cgroup, buf, PATH_MAX, current->nsproxy->cgroup_ns); css_put(css); if (retval >= PATH_MAX) + retval = -ENAMETOOLONG; + if (retval < 0) goto out_free; seq_puts(m, buf); seq_putc(m, '\n'); @@ -2711,7 +2712,7 @@ int proc_cpuset_show(struct seq_file *m, struct pid_namespace *ns, out_free: kfree(buf); out: - return 0; + return retval; } #endif /* CONFIG_PROC_PID_CPUSET */ -- cgit v1.2.3