Messages in this thread | | | Date | Tue, 11 Jan 2011 23:42:47 +0100 | From | matthieu castet <> | Subject | Re: [PATCH 3/3 V13] RO/NX protection for loadable kernel |
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Kees Cook a écrit : > Hi, > > I was just shown this[1] on Xen from an Ubuntu bug report[2]. > > [ 1.230382] NX-protecting the kernel data: 3884k > [ 1.231002] BUG: unable to handle kernel paging request at c1782ae0 > ... > [ 1.231145] Call Trace: > [ 1.231152] [<c0138481>] ? __change_page_attr+0x2c1/0x370 > [ 1.231161] [<c02163a1>] ? __purge_vmap_area_lazy+0xc1/0x180 > [ 1.231169] [<c013857c>] ? __change_page_attr_set_clr+0x4c/0xb0 > [ 1.231176] [<c0138838>] ? change_page_attr_set_clr+0x128/0x300 > [ 1.231183] [<c010798e>] ? __raw_callee_save_xen_restore_fl+0x6/0x8 > [ 1.231192] [<c0159ca1>] ? vprintk+0x171/0x3f0 > [ 1.231198] [<c0138bdf>] ? set_memory_nx+0x5f/0x70 > > > Does Xen have different size page table allocations or something weird? > Note that this one isn't related to this one but to "Add NX protection for kernel data".
But have no idea how xen page table work.
Matthieu -- 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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