diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-16 11:12:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-16 12:30:16 +0200 |
| commit | 5d4d38f1aa18036a0bd9d87410ea305bee3fc0a9 (patch) | |
| tree | 4521dc5ee1e603657c286785996e62aaf91372e8 | |
| parent | 2283d11429d6edbe6645d0f177f152a4c8625552 (diff) | |
Revert "time: Handle negative seconds correctly in timespec64_to_ns()"
This reverts commit 6fc340fa7942890046d1b38de8a13b93768c845b which is
commit 39ff83f2f6cc5cc1458dfcea9697f96338210beb upstream.
Arnd reports that this needs more review before being merged into all of
the trees.
Link: https://lore.kernel.org/r/CAK8P3a0z5jE=Z3Ps5bFTCFT7CHZR1JQ8VhdntDJAfsUxSPCcEw@mail.gmail.com
Reported-by: Arnd Bergmann <arnd@kernel.org>
Cc: Lukas Hannen <lukas.hannen@opensource.tttech-industrial.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/time64.h | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/include/linux/time64.h b/include/linux/time64.h index 81b9686a2079..5117cb5b5656 100644 --- a/include/linux/time64.h +++ b/include/linux/time64.h @@ -25,9 +25,7 @@ struct itimerspec64 { #define TIME64_MIN (-TIME64_MAX - 1) #define KTIME_MAX ((s64)~((u64)1 << 63)) -#define KTIME_MIN (-KTIME_MAX - 1) #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC) -#define KTIME_SEC_MIN (KTIME_MIN / NSEC_PER_SEC) /* * Limits for settimeofday(): @@ -126,13 +124,10 @@ static inline bool timespec64_valid_settod(const struct timespec64 *ts) */ static inline s64 timespec64_to_ns(const struct timespec64 *ts) { - /* Prevent multiplication overflow / underflow */ - if (ts->tv_sec >= KTIME_SEC_MAX) + /* Prevent multiplication overflow */ + if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX) return KTIME_MAX; - if (ts->tv_sec <= KTIME_SEC_MIN) - return KTIME_MIN; - return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec; } |