From: "tip-bot2 for Peter Zijlstra" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Andy Lutomirski <luto@amacapital.net>,
Marco Elver <elver@google.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Lai Jiangshan <jiangshanlai@gmail.com>, x86 <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [tip: x86/entry] x86/entry: Increase entry_stack size to a full page
Date: Thu, 25 Jun 2020 11:53:32 -0000 [thread overview]
Message-ID: <159308601261.16989.8417394079734931145.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200618144801.819246178@infradead.org>
The following commit has been merged into the x86/entry branch of tip:
Commit-ID: c7aadc09321d8f9a1d3bd1e6d8a47222ecddf6c5
Gitweb: https://git.kernel.org/tip/c7aadc09321d8f9a1d3bd1e6d8a47222ecddf6c5
Author: Peter Zijlstra <peterz@infradead.org>
AuthorDate: Wed, 17 Jun 2020 18:25:57 +02:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Thu, 25 Jun 2020 13:45:40 +02:00
x86/entry: Increase entry_stack size to a full page
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
---
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 42cd333..03b7c4c 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -370,7 +370,7 @@ struct x86_hw_tss {
#define IO_BITMAP_OFFSET_INVALID (__KERNEL_TSS_LIMIT + 1)
struct entry_stack {
- unsigned long words[64];
+ char stack[PAGE_SIZE];
};
struct entry_stack_page {
next prev parent reply other threads:[~2020-06-25 11:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-18 14:44 [PATCH 0/7] x86/entry: noinstr fixes Peter Zijlstra
2020-06-18 14:44 ` [PATCH 1/7] x86/entry: Fix #UD vs WARN more Peter Zijlstra
2020-06-18 14:57 ` Andy Lutomirski
2020-06-18 15:50 ` Peter Zijlstra
2020-06-18 18:36 ` Andy Lutomirski
2020-06-18 19:02 ` Peter Zijlstra
2020-06-18 19:29 ` Andy Lutomirski
2020-06-18 21:18 ` Peter Zijlstra
2020-06-22 11:47 ` Peter Zijlstra
2020-06-24 22:37 ` Andy Lutomirski
2020-06-25 11:53 ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-06-18 14:44 ` [PATCH 2/7] objtool: Dont consider vmlinux a C-file Peter Zijlstra
2020-06-25 11:53 ` [tip: x86/entry] objtool: Don't " tip-bot2 for Peter Zijlstra
2020-06-18 14:44 ` [PATCH 3/7] x86/entry: Fixup bad_iret vs noinstr Peter Zijlstra
2020-06-18 15:13 ` Marco Elver
2020-06-25 11:53 ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-06-18 14:44 ` [PATCH 4/7] x86/entry: Increase entry_stack size to a full page Peter Zijlstra
2020-06-18 15:06 ` Marco Elver
2020-06-19 3:10 ` Lai Jiangshan
2020-06-25 11:53 ` tip-bot2 for Peter Zijlstra [this message]
2020-06-18 14:44 ` [PATCH 5/7] objtool: Clean up elf_write() condition Peter Zijlstra
2020-06-18 14:44 ` [PATCH 6/7] objtool: Provide elf_write_{insn,reloc}() Peter Zijlstra
2020-06-18 14:44 ` [PATCH 7/7] objtool: Fix noinstr vs KCOV Peter Zijlstra
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