diff options
| author | Myungho Jung <mhjungk@gmail.com> | 2017-04-19 15:24:50 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-05 09:44:04 +0200 |
| commit | 4c00015385faccd992e98dfedfeaa07ac56d7194 (patch) | |
| tree | 2e855591f069209760ace52fcf25899fabd259af | |
| parent | e2f803481a84804811656a658c32176b7eec36e8 (diff) | |
timer/sysclt: Restrict timer migration sysctl values to 0 and 1
commit b94bf594cf8ed67cdd0439e70fa939783471597a upstream.
timer_migration sysctl acts as a boolean switch, so the allowed values
should be restricted to 0 and 1.
Add the necessary extra fields to the sysctl table entry to enforce that.
[ tglx: Rewrote changelog ]
Signed-off-by: Myungho Jung <mhjungk@gmail.com>
Link: http://lkml.kernel.org/r/1492640690-3550-1-git-send-email-mhjungk@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kazuhiro Hayashi <kazuhiro3.hayashi@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/sysctl.c | 2 | ||||
| -rw-r--r-- | kernel/time/timer.c | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 265e0d0216e3..24d603d29512 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1189,6 +1189,8 @@ static struct ctl_table kern_table[] = { .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = timer_migration_handler, + .extra1 = &zero, + .extra2 = &one, }, #endif #ifdef CONFIG_BPF_SYSCALL diff --git a/kernel/time/timer.c b/kernel/time/timer.c index df445cde8a1e..7d670362891a 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -240,7 +240,7 @@ int timer_migration_handler(struct ctl_table *table, int write, int ret; mutex_lock(&mutex); - ret = proc_dointvec(table, write, buffer, lenp, ppos); + ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); if (!ret && write) timers_update_migration(false); mutex_unlock(&mutex); |