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Date: Tue, 23 May 2017 17:40:39 +0200 (CEST) From: Thomas Gleixner <tglx@...utronix.de> To: LKML <linux-kernel@...r.kernel.org> cc: x86@...utronix.de, Kees Cook <keescook@...omium.org> Subject: [WARNING] x86/mm: Found insecure W+X mapping at address .. As of 4.12-rc1 one of my machines triggers the insecure W+X mapping. It's consistenly 9 entries close to the beginning of the module space, before the first actual module starts. See below. Any ideas which avoid bisecting would be appreciated. Thanks, tglx ---[ Modules ]--- 0xffffffffc0000000-0xffffffffc017d000 1524K pte 0xffffffffc017d000-0xffffffffc017e000 4K RW GLB x pte 0xffffffffc017e000-0xffffffffc017f000 4K pte 0xffffffffc017f000-0xffffffffc0180000 4K RW GLB x pte 0xffffffffc0180000-0xffffffffc0181000 4K pte 0xffffffffc0181000-0xffffffffc0182000 4K RW GLB x pte 0xffffffffc0182000-0xffffffffc0183000 4K pte 0xffffffffc0183000-0xffffffffc0184000 4K RW GLB x pte 0xffffffffc0184000-0xffffffffc0185000 4K pte 0xffffffffc0185000-0xffffffffc0186000 4K RW GLB x pte 0xffffffffc0186000-0xffffffffc0187000 4K pte 0xffffffffc0187000-0xffffffffc0188000 4K RW GLB x pte 0xffffffffc0188000-0xffffffffc0189000 4K pte 0xffffffffc0189000-0xffffffffc018a000 4K RW GLB x pte 0xffffffffc018a000-0xffffffffc018b000 4K pte 0xffffffffc018b000-0xffffffffc018c000 4K RW GLB x pte 0xffffffffc018c000-0xffffffffc018d000 4K pte 0xffffffffc018d000-0xffffffffc018e000 4K RW GLB x pte First module starts here: 0xffffffffc018e000-0xffffffffc0191000 12K pte 0xffffffffc0191000-0xffffffffc0192000 4K ro GLB x pte ---[ Modules ]--- 0xffffffffc0000000-0xffffffffc0200000 2M pmd 0xffffffffc0200000-0xffffffffc02f8000 992K pte 0xffffffffc02f8000-0xffffffffc02f9000 4K RW GLB x pte 0xffffffffc02f9000-0xffffffffc02fa000 4K pte 0xffffffffc02fa000-0xffffffffc02fb000 4K RW GLB x pte 0xffffffffc02fb000-0xffffffffc02fc000 4K pte 0xffffffffc02fc000-0xffffffffc02fd000 4K RW GLB x pte 0xffffffffc02fd000-0xffffffffc02fe000 4K pte 0xffffffffc02fe000-0xffffffffc02ff000 4K RW GLB x pte 0xffffffffc02ff000-0xffffffffc0300000 4K pte 0xffffffffc0300000-0xffffffffc0301000 4K RW GLB x pte 0xffffffffc0301000-0xffffffffc0302000 4K pte 0xffffffffc0302000-0xffffffffc0303000 4K RW GLB x pte 0xffffffffc0303000-0xffffffffc0304000 4K pte 0xffffffffc0304000-0xffffffffc0305000 4K RW GLB x pte 0xffffffffc0305000-0xffffffffc0306000 4K pte 0xffffffffc0306000-0xffffffffc0307000 4K RW GLB x pte 0xffffffffc0307000-0xffffffffc0308000 4K pte 0xffffffffc0308000-0xffffffffc0309000 4K RW GLB x pte First module starts here: 0xffffffffc0309000-0xffffffffc030c000 12K pte 0xffffffffc030c000-0xffffffffc030d000 4K ro GLB x pte
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