From: Josh Poimboeuf <[email protected]>
commit d8dd25a461e4eec7190cb9d66616aceacc5110ad upstream.
When the current frame address (CFA) is stored on the stack (i.e.,
cfa->base == CFI_SP_INDIRECT), objtool neglects to adjust the stack
offset when there are subsequent pushes or pops. This results in bad
ORC data at the end of the ENTER_IRQ_STACK macro, when it puts the
previous stack pointer on the stack and does a subsequent push.
This fixes the following unwinder warning:
WARNING: can't dereference registers at 00000000f0a6bdba for ip
interrupt_entry+0x9f/0xa0
Fixes: 627fce14809b ("objtool: Add ORC unwind table generation")
Reported-by: Vince Weaver <[email protected]>
Reported-by: Dave Jones <[email protected]>
Reported-by: Steven Rostedt <[email protected]>
Reported-by: Vegard Nossum <[email protected]>
Reported-by: Joe Mario <[email protected]>
Reviewed-by: Miroslav Benes <[email protected]>
Signed-off-by: Josh Poimboeuf <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link:
https://lore.kernel.org/r/853d5d691b29e250333332f09b8e27410b2d9924.1587808742.git.jpoim...@redhat.com
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
tools/objtool/check.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1403,7 +1403,7 @@ static int update_insn_state_regs(struct
struct cfi_reg *cfa = &state->cfa;
struct stack_op *op = &insn->stack_op;
- if (cfa->base != CFI_SP)
+ if (cfa->base != CFI_SP && cfa->base != CFI_SP_INDIRECT)
return 0;
/* push */
