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Groups > linux.kernel > #1648220
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|---|---|
| From | Kees Cook <keescook@chromium.org> |
| Newsgroups | linux.kernel |
| Subject | Re: [WARNING] x86/mm: Found insecure W+X mapping at address .. |
| Date | Tue, 23 May 2017 18:00:01 +0200 |
| Message-ID | <tKko1-5cc-1@gated-at.bofh.it> (permalink) |
| References | <tKkem-58v-23@gated-at.bofh.it> |
| X-Original-To | Thomas Gleixner <tglx@linutronix.de> |
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On Tue, May 23, 2017 at 8:40 AM, Thomas Gleixner <tglx@linutronix.de> wrote: > 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. Is this the same as: https://lkml.org/lkml/2017/5/19/899 ? The location is very similar. -Kees > > 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 -- Kees Cook Pixel Security
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[WARNING] x86/mm: Found insecure W+X mapping at address .. Thomas Gleixner <tglx@linutronix.de> - 2017-05-23 17:50 +0200
Re: [WARNING] x86/mm: Found insecure W+X mapping at address .. Kees Cook <keescook@chromium.org> - 2017-05-23 18:00 +0200
Re: [WARNING] x86/mm: Found insecure W+X mapping at address .. Thomas Gleixner <tglx@linutronix.de> - 2017-05-23 18:40 +0200
Re: [WARNING] x86/mm: Found insecure W+X mapping at address .. Thomas Gleixner <tglx@linutronix.de> - 2017-05-23 22:50 +0200
Re: [WARNING] x86/mm: Found insecure W+X mapping at address .. Steven Rostedt <rostedt@goodmis.org> - 2017-05-24 01:00 +0200
Re: [WARNING] x86/mm: Found insecure W+X mapping at address .. Thomas Gleixner <tglx@linutronix.de> - 2017-05-24 08:30 +0200
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