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| author | Peter Zijlstra <peterz@infradead.org> | 2020-06-17 19:25:57 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-16 09:16:36 +0300 |
| commit | 4e9631a90830e675d756eed83219cf163a983340 (patch) | |
| tree | 57bbdddbd7d377613135d6caa8116e0bce5dbeeb /arch/x86 | |
| parent | 010f93079a260a8de14d2a58167bdaf3f322419c (diff) | |
| download | linux-4e9631a90830e675d756eed83219cf163a983340.tar.xz | |
x86/entry: Increase entry_stack size to a full page
[ 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>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 54f5d54280f6..a07dfdf7759e 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -334,7 +334,7 @@ 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 { |