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ARM: 9254/1: mm: Provide better message when kernel fault

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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 <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Wang Kefeng 2022-10-11 02:34:05 +01:00 committed by Russell King (Oracle)
parent d539fee9f8
commit b40b84b120
1 changed files with 3 additions and 2 deletions
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5
arch/arm/mm/fault.c
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@ -111,8 +111,9 @@ static void die_kernel_fault(const char *msg, struct mm_struct *mm,
{ {
bust_spinlocks(1); bust_spinlocks(1);
pr_alert("8<--- cut here ---\n"); pr_alert("8<--- cut here ---\n");
pr_alert("Unable to handle kernel %s at virtual address %08lx\n", pr_alert("Unable to handle kernel %s at virtual address %08lx when %s\n",
msg, addr); msg, addr, fsr & FSR_LNX_PF ? "execute" :
fsr & FSR_WRITE ? "write" : "read");
show_pte(KERN_ALERT, mm, addr); show_pte(KERN_ALERT, mm, addr);
die("Oops", regs, fsr); die("Oops", regs, fsr);