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ARM: allow __do_kernel_fault() to report execution of memory faults

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Allow __do_kernel_fault() to detect the execution of memory, so we can
provide the same fault message as do_page_fault() would do. This is
required when we split the kernel address fault handling from the
main do_page_fault() code path.

Reviewed-by: Xie Yuanbin <xieyuanbin1@huawei.com>
Tested-by: Xie Yuanbin <xieyuanbin1@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King (Oracle) 2025-12-05 17:09:44 +00:00
parent dea20281ac
commit 40b466db1d
1 changed files with 2 additions and 0 deletions
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2
arch/arm/mm/fault.c
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@ -175,6 +175,8 @@ __do_kernel_fault(struct mm_struct *mm, unsigned long addr, unsigned int fsr,
*/
if (addr < PAGE_SIZE) {
msg = "NULL pointer dereference";
} else if (is_permission_fault(fsr) && fsr & FSR_LNX_PF) {
msg = "execution of memory";
} else {
if (is_translation_fault(fsr) &&
kfence_handle_page_fault(addr, is_write_fault(fsr), regs))