From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Jinyang He <hejinyang@loongson.cn>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Sasha Levin <sashal@kernel.org>,
linux-mips@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 36/48] MIPS: KASLR: Avoid endless loop in sync_icache if synci_step is zero
Date: Tue, 22 Dec 2020 21:24:04 -0500 [thread overview]
Message-ID: <20201223022417.2794032-36-sashal@kernel.org> (raw)
In-Reply-To: <20201223022417.2794032-1-sashal@kernel.org>
From: Jinyang He <hejinyang@loongson.cn>
[ Upstream commit c0aac3a51cb6364bed367ee3e1a96ed414f386b4 ]
Most platforms do not need to do synci instruction operations when
synci_step is 0. But for example, the synci implementation on Loongson64
platform has some changes. On the one hand, it ensures that the memory
access instructions have been completed. On the other hand, it guarantees
that all prefetch instructions need to be fetched again. And its address
information is useless. Thus, only one synci operation is required when
synci_step is 0 on Loongson64 platform. I guess that some other platforms
have similar implementations on synci, so add judgment conditions in
`while` to ensure that at least all platforms perform synci operations
once. For those platforms that do not need synci, they just do one more
operation similar to nop.
Signed-off-by: Jinyang He <hejinyang@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/mips/kernel/relocate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/kernel/relocate.c b/arch/mips/kernel/relocate.c
index 1958910b75c07..f759aae1e1f3d 100644
--- a/arch/mips/kernel/relocate.c
+++ b/arch/mips/kernel/relocate.c
@@ -52,7 +52,7 @@ static void __init sync_icache(void *kbase, unsigned long kernel_length)
: "r" (kbase));
kbase += step;
- } while (kbase < kend);
+ } while (step && kbase < kend);
/* Completion barrier */
__sync();
--
2.27.0
next prev parent reply other threads:[~2020-12-23 2:33 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-23 2:23 [PATCH AUTOSEL 4.9 01/48] locks: Fix UBSAN undefined behaviour in flock64_to_posix_lock Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 02/48] tomoyo: fix clang pointer arithmetic warning Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 03/48] crypto: omap-aes - fix the reference count leak of omap device Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 04/48] staging: wimax: depends on NET Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 05/48] scsi: pm80xx: Avoid busywait in FW ready check Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 06/48] scsi: pm80xx: Fix pm8001_mpi_get_nvmd_resp() race condition Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 07/48] staging: rtl8192u: fix wrong judgement in rtl8192_rx_isr Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 08/48] mips: ar7: add missing iounmap() on error in ar7_gpio_init Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 09/48] locktorture: Prevent hangs for invalid arguments Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 10/48] rcutorture: " Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 11/48] drm: panel: simple: add missing platform_driver_unregister() in panel_simple_init Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 12/48] Bluetooth: hidp: use correct wait queue when removing ctrl_wait Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 13/48] net: skb_vlan_untag(): don't reset transport offset if set by GRO layer Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 14/48] MIPS: BMC47xx: fix kconfig dependency bug for BCM47XX_SSB Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 15/48] jfs: Fix memleak in dbAdjCtl Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 16/48] media: zr364xx: propagate errors from zr364xx_start_readpipe() Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 17/48] media: cec-core: first mark device unregistered, then wake up fhs Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 18/48] media: isif: reset global state Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 19/48] media: dvbdev: Fix memleak in dvb_register_device Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 20/48] mmc: tmio: do not print real IOMEM pointer Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 21/48] ARM: OMAP2+: Fix memleak in omap2xxx_clkt_vps_init Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 22/48] ALSA: usb-audio: Don't call usb_set_interface() at trigger callback Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 23/48] rxrpc: Don't leak the service-side session key to userspace Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 24/48] scsi: atari_scsi: Fix race condition between .queuecommand and EH Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 25/48] ARM: dts: hisilicon: fix errors detected by snps-dw-apb-uart.yaml Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 26/48] ARM: dts: hisilicon: fix errors detected by usb yaml Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 27/48] ARM: dts: hisilicon: fix errors detected by simple-bus.yaml Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 28/48] ARM: dts: hisilicon: fix errors detected by spi-pl022.yaml Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 29/48] selftests/x86/fsgsbase: Fix GS == 1, 2, and 3 tests Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 30/48] brcmsmac: ampdu: Check BA window size before checking block ack Sasha Levin
2020-12-23 2:23 ` [PATCH AUTOSEL 4.9 31/48] iommu/tegra-smmu: Expand mutex protection range Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 32/48] crypto: qce - Fix SHA result buffer corruption issues Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 33/48] media: gp8psk: initialize stats at power control logic Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 34/48] net/lapb: fix t1 timer handling for LAPB_STATE_0 Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 35/48] x86/mce: Panic for LMCE only if mca_cfg.tolerant < 3 Sasha Levin
2020-12-23 2:24 ` Sasha Levin [this message]
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 37/48] mwifiex: Fix possible buffer overflows in mwifiex_cmd_802_11_ad_hoc_start Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 38/48] misc: vmw_vmci: fix kernel info-leak by initializing dbells in vmci_ctx_get_chkpt_doorbells() Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 39/48] iwlwifi: trans: consider firmware dead after errors Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 40/48] iwlwifi: add an extra firmware state in the transport Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 41/48] nl80211: always accept scan request with the duration set Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 42/48] cfg80211: Save the regulatory domain when setting custom regulatory Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 43/48] mac80211: disallow band-switch during CSA Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 44/48] mac80211: Fix calculation of minimal channel width Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 45/48] mac80211: don't filter out beacons once we start CSA Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 46/48] mac80211: Update rate control on channel change Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 47/48] ALSA: hda/hdmi: packet buffer index must be set before reading value Sasha Levin
2020-12-23 2:24 ` [PATCH AUTOSEL 4.9 48/48] PCI: Add function 1 DMA alias quirk for Marvell 9215 SATA controller Sasha Levin
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