From d8794ac20a299b647ba9958f6d657051fc51a540 Mon Sep 17 00:00:00 2001 From: Jinjie Ruan Date: Wed, 9 Oct 2024 15:23:01 +0800 Subject: [PATCH 1/2] posix-clock: Fix missing timespec64 check in pc_clock_settime() As Andrew pointed out, it will make sense that the PTP core checked timespec64 struct's tv_sec and tv_nsec range before calling ptp->info->settime64(). As the man manual of clock_settime() said, if tp.tv_sec is negative or tp.tv_nsec is outside the range [0..999,999,999], it should return EINVAL, which include dynamic clocks which handles PTP clock, and the condition is consistent with timespec64_valid(). As Thomas suggested, timespec64_valid() only check the timespec is valid, but not ensure that the time is in a valid range, so check it ahead using timespec64_valid_strict() in pc_clock_settime() and return -EINVAL if not valid. There are some drivers that use tp->tv_sec and tp->tv_nsec directly to write registers without validity checks and assume that the higher layer has checked it, which is dangerous and will benefit from this, such as hclge_ptp_settime(), igb_ptp_settime_i210(), _rcar_gen4_ptp_settime(), and some drivers can remove the checks of itself. Cc: stable@vger.kernel.org Fixes: 0606f422b453 ("posix clocks: Introduce dynamic clocks") Acked-by: Richard Cochran Suggested-by: Andrew Lunn Suggested-by: Thomas Gleixner Signed-off-by: Jinjie Ruan Link: https://patch.msgid.link/20241009072302.1754567-2-ruanjinjie@huawei.com Signed-off-by: Jakub Kicinski --- kernel/time/posix-clock.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c index c2f3d0c490d5..316a4e8c97d3 100644 --- a/kernel/time/posix-clock.c +++ b/kernel/time/posix-clock.c @@ -318,6 +318,9 @@ static int pc_clock_settime(clockid_t id, const struct timespec64 *ts) goto out; } + if (!timespec64_valid_strict(ts)) + return -EINVAL; + if (cd.clk->ops.clock_settime) err = cd.clk->ops.clock_settime(cd.clk, ts); else From ea531dc66e27dcc5216bee1a76d1c052ab9eb5b6 Mon Sep 17 00:00:00 2001 From: Jinjie Ruan Date: Wed, 9 Oct 2024 15:23:02 +0800 Subject: [PATCH 2/2] net: lan743x: Remove duplicate check Since timespec64_valid() has been checked in higher layer pc_clock_settime(), the duplicate check in lan743x_ptpci_settime64() can be removed. Acked-by: Richard Cochran Signed-off-by: Jinjie Ruan Link: https://patch.msgid.link/20241009072302.1754567-3-ruanjinjie@huawei.com Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/microchip/lan743x_ptp.c | 35 ++++++++------------ 1 file changed, 14 insertions(+), 21 deletions(-) diff --git a/drivers/net/ethernet/microchip/lan743x_ptp.c b/drivers/net/ethernet/microchip/lan743x_ptp.c index dcea6652d56d..4a777b449ecd 100644 --- a/drivers/net/ethernet/microchip/lan743x_ptp.c +++ b/drivers/net/ethernet/microchip/lan743x_ptp.c @@ -401,28 +401,21 @@ static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci, u32 nano_seconds = 0; u32 seconds = 0; - if (ts) { - if (ts->tv_sec > 0xFFFFFFFFLL || - ts->tv_sec < 0) { - netif_warn(adapter, drv, adapter->netdev, - "ts->tv_sec out of range, %lld\n", - ts->tv_sec); - return -ERANGE; - } - if (ts->tv_nsec >= 1000000000L || - ts->tv_nsec < 0) { - netif_warn(adapter, drv, adapter->netdev, - "ts->tv_nsec out of range, %ld\n", - ts->tv_nsec); - return -ERANGE; - } - seconds = ts->tv_sec; - nano_seconds = ts->tv_nsec; - lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0); - } else { - netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n"); - return -EINVAL; + if (ts->tv_sec > 0xFFFFFFFFLL) { + netif_warn(adapter, drv, adapter->netdev, + "ts->tv_sec out of range, %lld\n", + ts->tv_sec); + return -ERANGE; } + if (ts->tv_nsec < 0) { + netif_warn(adapter, drv, adapter->netdev, + "ts->tv_nsec out of range, %ld\n", + ts->tv_nsec); + return -ERANGE; + } + seconds = ts->tv_sec; + nano_seconds = ts->tv_nsec; + lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0); return 0; }