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Diffstat (limited to 'kernel/futex.c')
-rw-r--r--kernel/futex.c63
1 files changed, 37 insertions, 26 deletions
diff --git a/kernel/futex.c b/kernel/futex.c
index 4ddfdce325ad..4938a00bc785 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -3757,30 +3757,48 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
return -ENOSYS;
}
+static __always_inline bool futex_cmd_has_timeout(u32 cmd)
+{
+ switch (cmd) {
+ case FUTEX_WAIT:
+ case FUTEX_LOCK_PI:
+ case FUTEX_WAIT_BITSET:
+ case FUTEX_WAIT_REQUEUE_PI:
+ return true;
+ }
+ return false;
+}
+
+static __always_inline int
+futex_init_timeout(u32 cmd, u32 op, struct timespec64 *ts, ktime_t *t)
+{
+ if (!timespec64_valid(ts))
+ return -EINVAL;
+
+ *t = timespec64_to_ktime(*ts);
+ if (cmd == FUTEX_WAIT)
+ *t = ktime_add_safe(ktime_get(), *t);
+ else if (cmd != FUTEX_LOCK_PI && !(op & FUTEX_CLOCK_REALTIME))
+ *t = timens_ktime_to_host(CLOCK_MONOTONIC, *t);
+ return 0;
+}
SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val,
const struct __kernel_timespec __user *, utime,
u32 __user *, uaddr2, u32, val3)
{
- struct timespec64 ts;
+ int ret, cmd = op & FUTEX_CMD_MASK;
ktime_t t, *tp = NULL;
- int cmd = op & FUTEX_CMD_MASK;
+ struct timespec64 ts;
- if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI ||
- cmd == FUTEX_WAIT_BITSET ||
- cmd == FUTEX_WAIT_REQUEUE_PI)) {
+ if (utime && futex_cmd_has_timeout(cmd)) {
if (unlikely(should_fail_futex(!(op & FUTEX_PRIVATE_FLAG))))
return -EFAULT;
if (get_timespec64(&ts, utime))
return -EFAULT;
- if (!timespec64_valid(&ts))
- return -EINVAL;
-
- t = timespec64_to_ktime(ts);
- if (cmd == FUTEX_WAIT)
- t = ktime_add_safe(ktime_get(), t);
- else if (cmd != FUTEX_LOCK_PI && !(op & FUTEX_CLOCK_REALTIME))
- t = timens_ktime_to_host(CLOCK_MONOTONIC, t);
+ ret = futex_init_timeout(cmd, op, &ts, &t);
+ if (ret)
+ return ret;
tp = &t;
}
@@ -3950,23 +3968,16 @@ SYSCALL_DEFINE6(futex_time32, u32 __user *, uaddr, int, op, u32, val,
const struct old_timespec32 __user *, utime, u32 __user *, uaddr2,
u32, val3)
{
- struct timespec64 ts;
+ int ret, cmd = op & FUTEX_CMD_MASK;
ktime_t t, *tp = NULL;
- int cmd = op & FUTEX_CMD_MASK;
+ struct timespec64 ts;
- if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI ||
- cmd == FUTEX_WAIT_BITSET ||
- cmd == FUTEX_WAIT_REQUEUE_PI)) {
+ if (utime && futex_cmd_has_timeout(cmd)) {
if (get_old_timespec32(&ts, utime))
return -EFAULT;
- if (!timespec64_valid(&ts))
- return -EINVAL;
-
- t = timespec64_to_ktime(ts);
- if (cmd == FUTEX_WAIT)
- t = ktime_add_safe(ktime_get(), t);
- else if (cmd != FUTEX_LOCK_PI && !(op & FUTEX_CLOCK_REALTIME))
- t = timens_ktime_to_host(CLOCK_MONOTONIC, t);
+ ret = futex_init_timeout(cmd, op, &ts, &t);
+ if (ret)
+ return ret;
tp = &t;
}