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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Dan Li <ashimida@linux.alibaba.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 20/41] arm64: Mark __stack_chk_guard as __ro_after_init
Date: Mon,  4 Oct 2021 14:52:11 +0200	[thread overview]
Message-ID: <20211004125027.226245055@linuxfoundation.org> (raw)
In-Reply-To: <20211004125026.597501645@linuxfoundation.org>

From: Dan Li <ashimida@linux.alibaba.com>

[ Upstream commit 9fcb2e93f41c07a400885325e7dbdfceba6efaec ]

__stack_chk_guard is setup once while init stage and never changed
after that.

Although the modification of this variable at runtime will usually
cause the kernel to crash (so does the attacker), it should be marked
as __ro_after_init, and it should not affect performance if it is
placed in the ro_after_init section.

Signed-off-by: Dan Li <ashimida@linux.alibaba.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/1631612642-102881-1-git-send-email-ashimida@linux.alibaba.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm64/kernel/process.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 10d6627673cb..6cd79888944e 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -55,7 +55,7 @@
 
 #ifdef CONFIG_CC_STACKPROTECTOR
 #include <linux/stackprotector.h>
-unsigned long __stack_chk_guard __read_mostly;
+unsigned long __stack_chk_guard __ro_after_init;
 EXPORT_SYMBOL(__stack_chk_guard);
 #endif
 
-- 
2.33.0




  parent reply	other threads:[~2021-10-04 12:54 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-04 12:51 [PATCH 4.4 00/41] 4.4.286-rc1 review Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 01/41] usb: gadget: r8a66597: fix a loop in set_feature() Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 02/41] usb: musb: tusb6010: uninitialized data in tusb_fifo_write_unaligned() Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 03/41] cifs: fix incorrect check for null pointer in header_assemble Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 04/41] xen/x86: fix PV trap handling on secondary processors Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 05/41] USB: serial: cp210x: add ID for GW Instek GDM-834x Digital Multimeter Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 06/41] USB: serial: mos7840: remove duplicated 0xac24 device ID Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 07/41] USB: serial: option: add Telit LN920 compositions Greg Kroah-Hartman
2021-10-04 12:51 ` [PATCH 4.4 08/41] USB: serial: option: remove duplicate USB device ID Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 09/41] USB: serial: option: add device id for Foxconn T99W265 Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 10/41] net: hso: fix muxed tty registration Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 11/41] net/mlx4_en: Dont allow aRFS for encapsulated packets Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 12/41] scsi: iscsi: Adjust iface sysfs attr detection Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 13/41] blktrace: Fix uaf in blk_trace access after removing by sysfs Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 14/41] m68k: Double cast io functions to unsigned long Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 15/41] compiler.h: Introduce absolute_pointer macro Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 16/41] net: i825xx: Use absolute_pointer for memcpy from fixed memory location Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 17/41] sparc: avoid stringop-overread errors Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 18/41] qnx4: " Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 19/41] parisc: Use absolute_pointer() to define PAGE0 Greg Kroah-Hartman
2021-10-04 12:52 ` Greg Kroah-Hartman [this message]
2021-10-04 12:52 ` [PATCH 4.4 21/41] alpha: Declare virt_to_phys and virt_to_bus parameter as pointer to volatile Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 22/41] net: 6pack: Fix tx timeout and slot time Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 23/41] spi: Fix tegra20 build with CONFIG_PM=n Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 24/41] qnx4: work around gcc false positive warning bug Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 25/41] tty: Fix out-of-bound vmalloc access in imageblit Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 26/41] mac80211: fix use-after-free in CCMP/GCMP RX Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 27/41] ipvs: check that ip_vs_conn_tab_bits is between 8 and 20 Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 28/41] e100: fix length calculation in e100_get_regs_len Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 29/41] e100: fix buffer overrun in e100_get_regs Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 30/41] ipack: ipoctal: fix stack information leak Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 31/41] ipack: ipoctal: fix tty registration race Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 32/41] ipack: ipoctal: fix tty-registration error handling Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 33/41] ipack: ipoctal: fix missing allocation-failure check Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 34/41] ipack: ipoctal: fix module reference leak Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 35/41] ext4: fix potential infinite loop in ext4_dx_readdir() Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 36/41] EDAC/synopsys: Fix wrong value type assignment for edac_mode Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 37/41] arm64: Extend workaround for erratum 1024718 to all versions of Cortex-A55 Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 38/41] HID: betop: fix slab-out-of-bounds Write in betop_probe Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 39/41] netfilter: ipset: Fix oversized kvmalloc() calls Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 40/41] HID: usbhid: free raw_report buffers in usbhid_stop Greg Kroah-Hartman
2021-10-04 12:52 ` [PATCH 4.4 41/41] net: mdiobus: Fix memory leak in __mdiobus_register Greg Kroah-Hartman
2021-10-04 18:06 ` [PATCH 4.4 00/41] 4.4.286-rc1 review Pavel Machek
2021-10-04 19:50 ` Shuah Khan
2021-10-05  2:13 ` Guenter Roeck

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