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| author | Christian Brauner <christian@brauner.io> | 2018-08-21 22:00:11 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 10:52:50 -0700 |
| commit | 2a9b90940957d3c0f744011b02b4575323be5947 (patch) | |
| tree | 382185fc1b8eb5173cd65d896016bc18f4a1fe3c /kernel | |
| parent | d8f993b3dba05ff354f9b9592afc44b1b3dbfd46 (diff) | |
| download | linux-2a9b90940957d3c0f744011b02b4575323be5947.tar.gz | |
signal: make kill_ok_by_cred() return bool
kill_ok_by_cred() already behaves like a boolean function. Let's actually declare it as such too. Link: http://lkml.kernel.org/r/20180602103653.18181-7-christian@brauner.io Signed-off-by: Christian Brauner <christian@brauner.io> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Morris <james.morris@microsoft.com> Cc: Kees Cook <keescook@chromium.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/signal.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index adeee5095039..0e1bb87415c4 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); } /* |