From b40b84b120f5cb5f8c6de0b404ffb68cf72b7c90 Mon Sep 17 00:00:00 2001 From: Wang Kefeng Date: Tue, 11 Oct 2022 02:34:05 +0100 Subject: ARM: 9254/1: mm: Provide better message when kernel fault If there is a kernel fault, see do_kernel_fault(), we only print the generic "paging request" or "NULL pointer dereference" message which don't show read, write or excute information, let's provide better fault message for them. Signed-off-by: Kefeng Wang Signed-off-by: Russell King (Oracle) --- arch/arm/mm/fault.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/arm/mm/fault.c') diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 46cccd6bf705..f8fe0ec64c23 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -111,8 +111,9 @@ static void die_kernel_fault(const char *msg, struct mm_struct *mm, { bust_spinlocks(1); pr_alert("8<--- cut here ---\n"); - pr_alert("Unable to handle kernel %s at virtual address %08lx\n", - msg, addr); + pr_alert("Unable to handle kernel %s at virtual address %08lx when %s\n", + msg, addr, fsr & FSR_LNX_PF ? "execute" : + fsr & FSR_WRITE ? "write" : "read"); show_pte(KERN_ALERT, mm, addr); die("Oops", regs, fsr); -- cgit