Messages in this thread Patch in this message | | | From | Kefeng Wang <> | Subject | [PATCH v3] ARM: mm: Provide better message when kernel fault | Date | Tue, 27 Sep 2022 14:21:34 +0800 |
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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> --- v3: show the infos in die_kernel_fault() arch/arm/mm/fault.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
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); -- 2.35.3
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