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Groups > linux.kernel > #1234480
| From | "H. Peter Anvin" <hpa@zytor.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: rwx mapping between ex_table and rodata |
| Date | 2015-09-28 23:20 +0200 |
| Message-ID | <qdO04-2Tc-43@gated-at.bofh.it> (permalink) |
| References | <qclt7-5sk-5@gated-at.bofh.it> <qclCO-5zE-9@gated-at.bofh.it> <qcnbz-7Zv-11@gated-at.bofh.it> <qcvCa-32z-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 09/25/2015 12:22 AM, Ingo Molnar wrote: >> >> To me it looks like another alignment/padding issue like got fixed >> before. The space between __ex_table and rodata is (seems?) unused, so >> the default page table permissions end up being W+X. Can we fix the >> default to be NX instead? It'll make these bugs stay gone. > > Yeah. Wanna send a patch for that? > At least in the high mapping space, the default should be no permissions (not present), rather than just NX. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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Re: rwx mapping between ex_table and rodata Kees Cook <keescook@chromium.org> - 2015-09-25 00:30 +0200
Re: rwx mapping between ex_table and rodata Ingo Molnar <mingo@kernel.org> - 2015-09-25 09:30 +0200
Re: rwx mapping between ex_table and rodata Ingo Molnar <mingo@kernel.org> - 2015-09-25 09:30 +0200
Re: rwx mapping between ex_table and rodata Kees Cook <keescook@chromium.org> - 2015-09-26 18:50 +0200
Re: rwx mapping between ex_table and rodata "H. Peter Anvin" <hpa@zytor.com> - 2015-09-28 23:20 +0200
Re: rwx mapping between ex_table and rodata Kees Cook <keescook@chromium.org> - 2015-09-29 00:10 +0200
Re: rwx mapping between ex_table and rodata "H. Peter Anvin" <hpa@zytor.com> - 2015-09-29 00:30 +0200
Re: rwx mapping between ex_table and rodata Stephen Smalley <sds@tycho.nsa.gov> - 2015-09-28 16:20 +0200
Re: rwx mapping between ex_table and rodata Kees Cook <keescook@chromium.org> - 2015-09-28 20:30 +0200
Re: rwx mapping between ex_table and rodata Ingo Molnar <mingo@kernel.org> - 2015-10-01 09:20 +0200
Re: rwx mapping between ex_table and rodata Thomas Gleixner <tglx@linutronix.de> - 2015-10-01 11:10 +0200
Re: rwx mapping between ex_table and rodata Ingo Molnar <mingo@kernel.org> - 2015-10-01 11:20 +0200
Re: rwx mapping between ex_table and rodata Kees Cook <keescook@chromium.org> - 2015-10-01 19:50 +0200
Re: rwx mapping between ex_table and rodata Ingo Molnar <mingo@kernel.org> - 2015-10-02 09:20 +0200
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