From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, "Riwen Lu" <luriwen@kylinos.cn>,
"Eric Wong" <e@80x24.org>, "Mateusz Jończyk" <mat.jonczyk@o2.pl>,
"Alexandre Belloni" <alexandre.belloni@bootlin.com>
Subject: [PATCH 4.9 45/48] rtc: cmos: Evaluate century appropriate
Date: Mon, 7 Feb 2022 12:06:18 +0100 [thread overview]
Message-ID: <20220207103753.795773960@linuxfoundation.org> (raw)
In-Reply-To: <20220207103752.341184175@linuxfoundation.org>
From: Riwen Lu <luriwen@kylinos.cn>
commit ff164ae39b82ee483b24579c8e22a13a8ce5bd04 upstream.
There's limiting the year to 2069. When setting the rtc year to 2070,
reading it returns 1970. Evaluate century starting from 19 to count the
correct year.
$ sudo date -s 20700106
Mon 06 Jan 2070 12:00:00 AM CST
$ sudo hwclock -w
$ sudo hwclock -r
1970-01-06 12:00:49.604968+08:00
Fixes: 2a4daadd4d3e5071 ("rtc: cmos: ignore bogus century byte")
Signed-off-by: Riwen Lu <luriwen@kylinos.cn>
Acked-by: Eric Wong <e@80x24.org>
Reviewed-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220106084609.1223688-1-luriwen@kylinos.cn
Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl> # preparation for stable
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/rtc/rtc-mc146818-lib.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/rtc/rtc-mc146818-lib.c
+++ b/drivers/rtc/rtc-mc146818-lib.c
@@ -82,7 +82,7 @@ unsigned int mc146818_get_time(struct rt
time->tm_year += real_year - 72;
#endif
- if (century > 20)
+ if (century > 19)
time->tm_year += (century - 19) * 100;
/*
next prev parent reply other threads:[~2022-02-07 11:13 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-07 11:05 [PATCH 4.9 00/48] 4.9.300-rc1 review Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 01/48] can: bcm: fix UAF of bcm op Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 02/48] Bluetooth: refactor malicious adv data check Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 03/48] s390/hypfs: include z/VM guests with access control group set Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 04/48] scsi: zfcp: Fix failed recovery on gone remote port with non-NPIV FCP devices Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 05/48] udf: Restore i_lenAlloc when inode expansion fails Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 06/48] udf: Fix NULL ptr deref when converting from inline format Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 07/48] PM: wakeup: simplify the output logic of pm_show_wakelocks() Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 08/48] serial: stm32: fix software flow control transfer Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 09/48] tty: n_gsm: fix SW flow control encoding/handling Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 10/48] tty: Add support for Brainboxes UC cards Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 11/48] usb-storage: Add unusual-devs entry for VL817 USB-SATA bridge Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 12/48] usb: gadget: f_sourcesink: Fix isoc transfer for USB_SPEED_SUPER_PLUS Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 13/48] USB: core: Fix hang in usb_kill_urb by adding memory barriers Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 14/48] powerpc/32: Fix boot failure with GCC latent entropy plugin Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 15/48] scsi: bnx2fc: Flush destroy_work queue before calling bnx2fc_interface_put() Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 16/48] ipv6_tunnel: Rate limit warning messages Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 17/48] net: fix information leakage in /proc/net/ptype Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 18/48] ipv4: avoid using shared IP generator for connected sockets Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 19/48] NFSv4: Handle case where the lookup of a directory fails Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 20/48] NFSv4: nfs_atomic_open() can race when looking up a non-regular file Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 21/48] net-procfs: show net devices bound packet types Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 22/48] drm/msm: Fix wrong size calculation Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 23/48] hwmon: (lm90) Reduce maximum conversion rate for G781 Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 24/48] ipv4: raw: lock the socket in raw_bind() Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 25/48] ipv4: tcp: send zero IPID in SYNACK messages Greg Kroah-Hartman
2022-02-07 11:05 ` [PATCH 4.9 26/48] netfilter: nat: remove l4 protocol port rovers Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 27/48] netfilter: nat: limit port clash resolution attempts Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 28/48] ipheth: fix EOVERFLOW in ipheth_rcvbulk_callback Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 29/48] net: amd-xgbe: ensure to reset the tx_timer_active flag Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 30/48] net: amd-xgbe: Fix skb data length underflow Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 31/48] rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink() Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 32/48] af_packet: fix data-race in packet_setsockopt / packet_setsockopt Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 33/48] ASoC: ops: Reject out of bounds values in snd_soc_put_volsw() Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 34/48] ASoC: ops: Reject out of bounds values in snd_soc_put_volsw_sx() Greg Kroah-Hartman
2022-06-03 10:06 ` Pavel Machek
2022-06-03 10:28 ` Mark Brown
2022-06-04 10:54 ` Mark Brown
2022-02-07 11:06 ` [PATCH 4.9 35/48] ASoC: ops: Reject out of bounds values in snd_soc_put_xr_sx() Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 36/48] drm/nouveau: fix off by one in BIOS boundary checking Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 37/48] iommu/amd: Fix loop timeout issue in iommu_ga_log_enable() Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 38/48] spi: bcm-qspi: check for valid cs before applying chip select Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 39/48] spi: mediatek: Avoid NULL pointer crash in interrupt Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 40/48] net: ieee802154: Return meaningful error codes from the netlink helpers Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 41/48] net: macsec: Verify that send_sci is on when setting Tx sci explicitly Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 42/48] ASoC: fsl: Add missing error handling in pcm030_fabric_probe Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 43/48] scsi: bnx2fc: Make bnx2fc_recv_frame() mp safe Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 44/48] nfsd: nfsd4_setclientid_confirm mistakenly expires confirmed client Greg Kroah-Hartman
2022-02-07 11:06 ` Greg Kroah-Hartman [this message]
2022-02-07 11:06 ` [PATCH 4.9 46/48] EDAC/altera: Fix deferred probing Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 47/48] EDAC/xgene: " Greg Kroah-Hartman
2022-02-07 11:06 ` [PATCH 4.9 48/48] ext4: fix error handling in ext4_restore_inline_data() Greg Kroah-Hartman
2022-02-07 21:28 ` [PATCH 4.9 00/48] 4.9.300-rc1 review Shuah Khan
2022-02-07 22:20 ` Guenter Roeck
2022-02-07 23:07 ` Florian Fainelli
2022-02-08 1:45 ` Slade Watkins
2022-02-08 10:27 ` Naresh Kamboju
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