Messages in this thread |  | | Date | Wed, 18 Apr 2018 14:18:57 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH] x86/ldt: Fix support_pte_mask filtering in map_ldt_struct() |
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+ Rafael.
On Mon, Apr 16, 2018 at 08:39:37AM -0700, Dave Hansen wrote: > On 04/16/2018 08:16 AM, Andy Lutomirski wrote: > > On Mon, Apr 16, 2018 at 2:43 AM, Joerg Roedel <joro@8bytes.org> wrote: > >> From: Joerg Roedel <jroedel@suse.de> > >> > >> The |= operator will let us end up with an invalid PTE. Use > >> the correct &= instead. > > D'oh! Looks good. > > Yes, agreed. Thanks for finding that, Joerg!
Btw, even with Jörg's fix,
fb43d6cb91ef ("x86/mm: Do not auto-massage page protections")
is still broken. In my case
# CONFIG_MODIFY_LDT_SYSCALL is not set
so Jörg's patch doesn't have any effect.
I tried the patch before fb43d6cb91ef:
6baf4bec02db ("x86/espfix: Document use of _PAGE_GLOBAL")
and the machine's fine. But with fb43d6cb91ef I can't resume from disk properly and I'm seeing is the below splat:
[ 5.417480] PM: Image loading progress: 0% [ 5.631174] PM: Image loading progress: 10% [ 5.716705] PM: Image loading progress: 20% [ 5.805258] PM: Image loading progress: 30% [ 5.884919] random: crng init done [ 5.899245] PM: Image loading progress: 40% [ 5.980752] PM: Image loading progress: 50% [ 6.058269] PM: Image loading progress: 60% [ 6.138994] PM: Image loading progress: 70% [ 6.219384] PM: Image loading progress: 80% [ 6.299277] PM: Image loading progress: 90% [ 6.382403] PM: Image loading progress: 100% [ 6.386971] PM: Image loading done [ 6.390424] PM: Read 598112 kbytes in 1.03 seconds (580.69 MB/s) [ 6.397450] PM: Image successfully loaded [ 6.631431] ACPI: EC: interrupt blocked [ 6.635383] Disabling non-boot CPUs ... [ 6.821452] ------------[ cut here ]------------ [ 6.826115] kernel BUG at arch/x86/mm/physaddr.c:27! [ 6.831126] invalid opcode: 0000 [#1] PREEMPT SMP [ 6.835872] Modules linked in: [ 6.838976] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.16.0+ #6 [ 6.845026] Hardware name: To be filled by O.E.M. To be filled by O.E.M./M5A97 EVO R2.0, BIOS 1503 01/16/2013 [ 6.854996] RIP: 0010:__phys_addr+0x38/0x50 [ 6.859220] RSP: 0018:ffffc90000017dc8 EFLAGS: 00010087 [ 6.864490] RAX: 0000780000000000 RBX: ffff880426f5b000 RCX: 0000000000000030 [ 6.871667] RDX: 0000000080000000 RSI: 000000001fe46a1b RDI: 0000000000000000 [ 6.878841] RBP: ffffc90000017e48 R08: 0000000000000000 R09: 0000000000000002 [ 6.886018] R10: 000000005ad731e5 R11: 00000000000002de R12: 0000000000000063 [ 6.893221] R13: 0000000000000000 R14: 00000000016001e3 R15: 0000000000000000 [ 6.900396] FS: 0000000000000000(0000) GS:ffff88043dc00000(0000) knlGS:0000000000000000 [ 6.908544] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6.914333] CR2: ffff88043efff000 CR3: 0000000002209000 CR4: 00000000000406f0 [ 6.921507] Call Trace: [ 6.924007] swsusp_arch_resume+0x112/0x3c0 [ 6.928235] ? hibernate_resume_nonboot_cpu_disable+0x30/0x30 [ 6.934024] ? save_processor_state+0xc9/0x250 [ 6.938514] ? set_debug_rodata+0x11/0x11 [ 6.942570] hibernation_restore+0x8d/0x130 [ 6.946797] ? hibernation_restore+0x130/0x130 [ 6.951286] load_image_and_restore+0x5e/0x99 [ 6.955690] software_resume+0x20f/0x2a0 [ 6.959661] do_one_initcall+0x5c/0x1b0 [ 6.963544] kernel_init_freeable+0x123/0x1a5 [ 6.967945] ? rest_init+0xc0/0xc0 [ 6.971394] kernel_init+0xa/0x100 [ 6.974869] ret_from_fork+0x27/0x50 [ 6.978518] Code: 48 89 c2 72 28 48 b8 00 00 00 00 00 78 00 00 48 01 f8 48 39 c2 72 14 0f b6 0d fe e6 22 01 48 89 c2 48 d3 ea 48 85 d2 75 02 f3 c3 <0f> 0b 48 8b 05 0f 71 16 01 48 01 d0 48 81 fa ff ff ff 1f 76 e9 [ 6.997454] RIP: __phys_addr+0x38/0x50 RSP: ffffc90000017dc8 [ 7.003159] ---[ end trace 4b9d4661c2110f43 ]--- [ 7.007820] note: swapper/0[1] exited with preempt_count 1 [ 7.013353] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 7.013353] [ 7.022563] Kernel Offset: disabled [ 7.026098] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 7.026098] ]---
-- Regards/Gruss, Boris.
SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --
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