From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>,
Andy Lutomirski <luto@amacapital.net>,
Marco Elver <elver@google.com>,
Lai Jiangshan <jiangshanlai@gmail.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.14 16/17] x86/entry: Increase entry_stack size to a full page
Date: Wed, 1 Jul 2020 21:26:48 -0400 [thread overview]
Message-ID: <20200702012649.2701799-16-sashal@kernel.org> (raw)
In-Reply-To: <20200702012649.2701799-1-sashal@kernel.org>
From: Peter Zijlstra <peterz@infradead.org>
[ Upstream commit c7aadc09321d8f9a1d3bd1e6d8a47222ecddf6c5 ]
Marco crashed in bad_iret with a Clang11/KCSAN build due to
overflowing the stack. Now that we run C code on it, expand it to a
full page.
Suggested-by: Andy Lutomirski <luto@amacapital.net>
Reported-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200618144801.819246178@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/x86/include/asm/processor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 6a87eda9691e4..56a89519dc144 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -344,7 +344,7 @@ struct x86_hw_tss {
#define INVALID_IO_BITMAP_OFFSET 0x8000
struct entry_stack {
- unsigned long words[64];
+ char stack[PAGE_SIZE];
};
struct entry_stack_page {
--
2.25.1
next prev parent reply other threads:[~2020-07-02 1:29 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-02 1:26 [PATCH AUTOSEL 4.14 01/17] ARM: dts: omap4-droid4: Fix spi configuration and increase rate Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 02/17] gpu: host1x: Detach driver on unregister Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 03/17] net: usb: ax88179_178a: fix packet alignment padding Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 04/17] usb: usbtest: fix missing kfree(dev->buf) in usbtest_disconnect Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 05/17] spi: spidev: fix a race between spidev_release and spidev_remove Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 06/17] spi: spidev: fix a potential use-after-free in spidev_release() Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 07/17] tg3: driver sleeps indefinitely when EEH errors exceed eeh_max_freezes Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 08/17] ixgbe: protect ring accesses with READ- and WRITE_ONCE Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 09/17] usbnet: smsc95xx: Fix use-after-free after removal Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 10/17] s390/kasan: fix early pgm check handler execution Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 11/17] cifs: Fix double add page to memcg when cifs_readpages Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 12/17] cifs: update ctime and mtime during truncate Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 13/17] ARM: imx6: add missing put_device() call in imx6q_suspend_init() Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 14/17] scsi: mptscsih: Fix read sense data size Sasha Levin
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 15/17] nvme-rdma: assign completion vector correctly Sasha Levin
2020-07-02 1:26 ` Sasha Levin [this message]
2020-07-02 1:26 ` [PATCH AUTOSEL 4.14 17/17] kgdb: Avoid suspicious RCU usage warning Sasha Levin
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