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| author | Peter Zijlstra <peterz@infradead.org> | 2020-06-17 18:25:57 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-06-25 13:45:40 +0200 |
| commit | c7aadc09321d8f9a1d3bd1e6d8a47222ecddf6c5 (patch) | |
| tree | d3ef22ecfa4ca3a19b7ae3b2780ba4611b5a67d2 | |
| parent | e3a9e681adb779b39565a28b3252c3be1033f994 (diff) | |
| download | linux-c7aadc09321d8f9a1d3bd1e6d8a47222ecddf6c5.tar.gz | |
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
| -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 42cd333616c48..03b7c4ca425a6 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 { |