Messages in this thread Patch in this message | | | From | Xiang Zheng <> | Subject | [PATCH] arm64: print additional fault message when executing non-exec memory | Date | Mon, 28 Oct 2019 17:08:37 +0800 |
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When attempting to executing non-executable memory, the fault message shows:
Unable to handle kernel read from unreadable memory at virtual address ffff802dac469000
This may confuse someone, so add a new fault message for instruction abort.
Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com> --- arch/arm64/mm/fault.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 9fc6db0bcbad..68bf4ec376d0 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -318,6 +318,8 @@ static void __do_kernel_fault(unsigned long addr, unsigned int esr, if (is_el1_permission_fault(addr, esr, regs)) { if (esr & ESR_ELx_WNR) msg = "write to read-only memory"; + else if (is_el1_instruction_abort(esr)) + msg = "execute non-executable memory"; else msg = "read from unreadable memory"; } else if (addr < PAGE_SIZE) { -- 2.19.1
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