From: Josh Poimboeuf jpoimboe@redhat.com
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 vincent.weaver@maine.edu Reported-by: Dave Jones dsj@fb.com Reported-by: Steven Rostedt rostedt@goodmis.org Reported-by: Vegard Nossum vegard.nossum@oracle.com Reported-by: Joe Mario jmario@redhat.com Reviewed-by: Miroslav Benes mbenes@suse.cz Signed-off-by: Josh Poimboeuf jpoimboe@redhat.com Signed-off-by: Ingo Molnar mingo@kernel.org Cc: Andy Lutomirski luto@kernel.org Cc: Jann Horn jannh@google.com Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Link: https://lore.kernel.org/r/853d5d691b29e250333332f09b8e27410b2d9924.158780874... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/objtool/check.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1402,7 +1402,7 @@ 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 */