Commit-ID: b94bf594cf8ed67cdd0439e70fa939783471597a Gitweb: http://git.kernel.org/tip/b94bf594cf8ed67cdd0439e70fa939783471597a Author: Myungho Jung <[email protected]> AuthorDate: Wed, 19 Apr 2017 15:24:50 -0700 Committer: Thomas Gleixner <[email protected]> CommitDate: Thu, 20 Apr 2017 14:56:59 +0200
timer/sysclt: Restrict timer migration sysctl values to 0 and 1 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 <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- kernel/sysctl.c | 2 ++ kernel/time/timer.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index acf0a5a..0863769 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1176,6 +1176,8 @@ 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 1dc0256..cc6b6bd 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -241,7 +241,7 @@ 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);
