From: Amit Daniel Kachhap <amit.kachhap@arm.com> mainline inclusion from v5.7-rc1 commit cdcb61ae4c56 category: feature bugzilla: 27615 CVE: NA ------------------------------------------------- lr is printed with %pS which will try to find an entry in kallsyms. After enabling pointer authentication, this match will fail due to PAC present in the lr. Strip PAC from the lr to display the correct symbol name. Suggested-by: James Morse <james.morse@arm.com> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com> Reviewed-by: Vincenzo Frascino <Vincenzo.Frascino@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> Reviewed-by: Hanjun Guo <guohanjun@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- arch/arm64/kernel/process.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index a5f219c1296fa..7da480ed83f4e 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -274,7 +274,7 @@ void __show_regs(struct pt_regs *regs) if (!user_mode(regs)) { printk("pc : %pS\n", (void *)regs->pc); - printk("lr : %pS\n", (void *)lr); + printk("lr : %pS\n", (void *)ptrauth_strip_insn_pac(lr)); } else { printk("pc : %016llx\n", regs->pc); printk("lr : %016llx\n", lr); -- 2.25.1