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Subject[PATCH] x86/entry/64: Fix unwind hint for rewind_stack_do_exit
From
The leaq instruction in rewind_stack_do_exit moves the stack pointer
directly below the pt_regs at the top of the task stack before calling
do_exit(). Tell the unwinder to expect pt_regs.

Signed-off-by: Jann Horn <jannh@google.com>
---
arch/x86/entry/entry_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index f2bb91e87877..2393c803fd8c 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1739,7 +1739,7 @@ SYM_CODE_START(rewind_stack_do_exit)

movq PER_CPU_VAR(cpu_current_top_of_stack), %rax
leaq -PTREGS_SIZE(%rax), %rsp
- UNWIND_HINT_FUNC sp_offset=PTREGS_SIZE
+ UNWIND_HINT_REGS

call do_exit
SYM_CODE_END(rewind_stack_do_exit)
base-commit: 9f65ed5fe41ce08ed1cb1f6a950f9ec694c142ad
--
2.25.0.265.gbab2e86ba0-goog

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