[PATCH v2 06/17] signal: make kill_ok_by_cred() return bool

Christian Brauner
2018-06-01T13:23:00Z

kill_ok_by_cred() already behaves like a boolean function. Let's actually
declare it as such too.

Signed-off-by: Christian Brauner <christian@brauner.io>
---
v1->v2:
* unchanged
v0->v1:
* unchanged
---
kernel/signal.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/kernel/signal.c b/kernel/signal.c
index 00ed69d33282..bbd15e984a84 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -717,21 +717,16 @@ static inline bool si_fromuser(const struct siginfo *info)
/*
* called with RCU read lock from check_kill_permission()
*/
-static int kill_ok_by_cred(struct task_struct *t)
+static bool kill_ok_by_cred(struct task_struct *t)
{
const struct cred *cred = current_cred();
const struct cred *tcred = __task_cred(t);

- if (uid_eq(cred->euid, tcred->suid) ||
- uid_eq(cred->euid, tcred->uid) ||
- uid_eq(cred->uid, tcred->suid) ||
- uid_eq(cred->uid, tcred->uid))
- return 1;
-
- if (ns_capable(tcred->user_ns, CAP_KILL))
- return 1;
-
- return 0;
+ return uid_eq(cred->euid, tcred->suid) ||
+ uid_eq(cred->euid, tcred->uid) ||
+ uid_eq(cred->uid, tcred->suid) ||
+ uid_eq(cred->uid, tcred->uid) ||
+ ns_capable(tcred->user_ns, CAP_KILL);
}

/*
--
2.17.0