| Message ID | 1576486038-9899-12-git-send-email-amit.kachhap@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: return address signing | expand |
On Mon, Dec 16, 2019 at 02:17:13PM +0530, Amit Daniel Kachhap wrote: > 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> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 0d4a3b8..d35b4c0 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -262,7 +262,7 @@ 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);
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> --- Changes since last version: * None. arch/arm64/kernel/process.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)