diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0040-kaiser-Set-_PAGE_NX-only-if-supported.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0040-kaiser-Set-_PAGE_NX-only-if-supported.patch | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0040-kaiser-Set-_PAGE_NX-only-if-supported.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0040-kaiser-Set-_PAGE_NX-only-if-supported.patch new file mode 100644 index 00000000..b6131785 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0040-kaiser-Set-_PAGE_NX-only-if-supported.patch @@ -0,0 +1,121 @@ +From 4fcdcb102a1ff37315086c48dd5890e666533035 Mon Sep 17 00:00:00 2001 +From: Guenter Roeck <groeck@chromium.org> +Date: Thu, 4 Jan 2018 13:41:55 -0800 +Subject: [PATCH 040/102] kaiser: Set _PAGE_NX only if supported + +This resolves a crash if loaded under qemu + haxm under windows. +See https://www.spinics.net/lists/kernel/msg2689835.html for details. +Here is a boot log (the log is from chromeos-4.4, but Tao Wu says that +the same log is also seen with vanilla v4.4.110-rc1). + +[ 0.712750] Freeing unused kernel memory: 552K +[ 0.721821] init: Corrupted page table at address 57b029b332e0 +[ 0.722761] PGD 80000000bb238067 PUD bc36a067 PMD bc369067 PTE 45d2067 +[ 0.722761] Bad pagetable: 000b [#1] PREEMPT SMP +[ 0.722761] Modules linked in: +[ 0.722761] CPU: 1 PID: 1 Comm: init Not tainted 4.4.96 #31 +[ 0.722761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS +rel-1.7.5.1-0-g8936dbb-20141113_115728-nilsson.home.kraxel.org 04/01/2014 +[ 0.722761] task: ffff8800bc290000 ti: ffff8800bc28c000 task.ti: ffff8800bc28c000 +[ 0.722761] RIP: 0010:[<ffffffff83f4129e>] [<ffffffff83f4129e>] __clear_user+0x42/0x67 +[ 0.722761] RSP: 0000:ffff8800bc28fcf8 EFLAGS: 00010202 +[ 0.722761] RAX: 0000000000000000 RBX: 00000000000001a4 RCX: 00000000000001a4 +[ 0.722761] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000057b029b332e0 +[ 0.722761] RBP: ffff8800bc28fd08 R08: ffff8800bc290000 R09: ffff8800bb2f4000 +[ 0.722761] R10: ffff8800bc290000 R11: ffff8800bb2f4000 R12: 000057b029b332e0 +[ 0.722761] R13: 0000000000000000 R14: 000057b029b33340 R15: ffff8800bb1e2a00 +[ 0.722761] FS: 0000000000000000(0000) GS:ffff8800bfb00000(0000) knlGS:0000000000000000 +[ 0.722761] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b +[ 0.722761] CR2: 000057b029b332e0 CR3: 00000000bb2f8000 CR4: 00000000000006e0 +[ 0.722761] Stack: +[ 0.722761] 000057b029b332e0 ffff8800bb95fa80 ffff8800bc28fd18 ffffffff83f4120c +[ 0.722761] ffff8800bc28fe18 ffffffff83e9e7a1 ffff8800bc28fd68 0000000000000000 +[ 0.722761] ffff8800bc290000 ffff8800bc290000 ffff8800bc290000 ffff8800bc290000 +[ 0.722761] Call Trace: +[ 0.722761] [<ffffffff83f4120c>] clear_user+0x2e/0x30 +[ 0.722761] [<ffffffff83e9e7a1>] load_elf_binary+0xa7f/0x18f7 +[ 0.722761] [<ffffffff83de2088>] search_binary_handler+0x86/0x19c +[ 0.722761] [<ffffffff83de389e>] do_execveat_common.isra.26+0x909/0xf98 +[ 0.722761] [<ffffffff844febe0>] ? rest_init+0x87/0x87 +[ 0.722761] [<ffffffff83de40be>] do_execve+0x23/0x25 +[ 0.722761] [<ffffffff83c002e3>] run_init_process+0x2b/0x2d +[ 0.722761] [<ffffffff844fec4d>] kernel_init+0x6d/0xda +[ 0.722761] [<ffffffff84505b2f>] ret_from_fork+0x3f/0x70 +[ 0.722761] [<ffffffff844febe0>] ? rest_init+0x87/0x87 +[ 0.722761] Code: 86 84 be 12 00 00 00 e8 87 0d e8 ff 66 66 90 48 89 d8 48 c1 +eb 03 4c 89 e7 83 e0 07 48 89 d9 be 08 00 00 00 31 d2 48 85 c9 74 0a <48> 89 17 +48 01 f7 ff c9 75 f6 48 89 c1 85 c9 74 09 88 17 48 ff +[ 0.722761] RIP [<ffffffff83f4129e>] __clear_user+0x42/0x67 +[ 0.722761] RSP <ffff8800bc28fcf8> +[ 0.722761] ---[ end trace def703879b4ff090 ]--- +[ 0.722761] BUG: sleeping function called from invalid context at /mnt/host/source/src/third_party/kernel/v4.4/kernel/locking/rwsem.c:21 +[ 0.722761] in_atomic(): 0, irqs_disabled(): 1, pid: 1, name: init +[ 0.722761] CPU: 1 PID: 1 Comm: init Tainted: G D 4.4.96 #31 +[ 0.722761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5.1-0-g8936dbb-20141113_115728-nilsson.home.kraxel.org 04/01/2014 +[ 0.722761] 0000000000000086 dcb5d76098c89836 ffff8800bc28fa30 ffffffff83f34004 +[ 0.722761] ffffffff84839dc2 0000000000000015 ffff8800bc28fa40 ffffffff83d57dc9 +[ 0.722761] ffff8800bc28fa68 ffffffff83d57e6a ffffffff84a53640 0000000000000000 +[ 0.722761] Call Trace: +[ 0.722761] [<ffffffff83f34004>] dump_stack+0x4d/0x63 +[ 0.722761] [<ffffffff83d57dc9>] ___might_sleep+0x13a/0x13c +[ 0.722761] [<ffffffff83d57e6a>] __might_sleep+0x9f/0xa6 +[ 0.722761] [<ffffffff84502788>] down_read+0x20/0x31 +[ 0.722761] [<ffffffff83cc5d9b>] __blocking_notifier_call_chain+0x35/0x63 +[ 0.722761] [<ffffffff83cc5ddd>] blocking_notifier_call_chain+0x14/0x16 +[ 0.800374] usb 1-1: new full-speed USB device number 2 using uhci_hcd +[ 0.722761] [<ffffffff83cefe97>] profile_task_exit+0x1a/0x1c +[ 0.802309] [<ffffffff83cac84e>] do_exit+0x39/0xe7f +[ 0.802309] [<ffffffff83ce5938>] ? vprintk_default+0x1d/0x1f +[ 0.802309] [<ffffffff83d7bb95>] ? printk+0x57/0x73 +[ 0.802309] [<ffffffff83c46e25>] oops_end+0x80/0x85 +[ 0.802309] [<ffffffff83c7b747>] pgtable_bad+0x8a/0x95 +[ 0.802309] [<ffffffff83ca7f4a>] __do_page_fault+0x8c/0x352 +[ 0.802309] [<ffffffff83eefba5>] ? file_has_perm+0xc4/0xe5 +[ 0.802309] [<ffffffff83ca821c>] do_page_fault+0xc/0xe +[ 0.802309] [<ffffffff84507682>] page_fault+0x22/0x30 +[ 0.802309] [<ffffffff83f4129e>] ? __clear_user+0x42/0x67 +[ 0.802309] [<ffffffff83f4127f>] ? __clear_user+0x23/0x67 +[ 0.802309] [<ffffffff83f4120c>] clear_user+0x2e/0x30 +[ 0.802309] [<ffffffff83e9e7a1>] load_elf_binary+0xa7f/0x18f7 +[ 0.802309] [<ffffffff83de2088>] search_binary_handler+0x86/0x19c +[ 0.802309] [<ffffffff83de389e>] do_execveat_common.isra.26+0x909/0xf98 +[ 0.802309] [<ffffffff844febe0>] ? rest_init+0x87/0x87 +[ 0.802309] [<ffffffff83de40be>] do_execve+0x23/0x25 +[ 0.802309] [<ffffffff83c002e3>] run_init_process+0x2b/0x2d +[ 0.802309] [<ffffffff844fec4d>] kernel_init+0x6d/0xda +[ 0.802309] [<ffffffff84505b2f>] ret_from_fork+0x3f/0x70 +[ 0.802309] [<ffffffff844febe0>] ? rest_init+0x87/0x87 +[ 0.830559] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 +[ 0.830559] +[ 0.831305] Kernel Offset: 0x2c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) +[ 0.831305] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 + +The crash part of this problem may be solved with the following patch +(thanks to Hugh for the hint). There is still another problem, though - +with this patch applied, the qemu session aborts with "VCPU Shutdown +request", whatever that means. + +Cc: lepton <ytht.net@gmail.com> +Signed-off-by: Guenter Roeck <groeck@chromium.org> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/mm/kaiser.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c +index b6b0f3a..d8376b4 100644 +--- a/arch/x86/mm/kaiser.c ++++ b/arch/x86/mm/kaiser.c +@@ -413,7 +413,8 @@ pgd_t kaiser_set_shadow_pgd(pgd_t *pgdp, pgd_t pgd) + * get out to userspace running on the kernel CR3, + * userspace will crash instead of running. + */ +- pgd.pgd |= _PAGE_NX; ++ if (__supported_pte_mask & _PAGE_NX) ++ pgd.pgd |= _PAGE_NX; + } + } else if (!pgd.pgd) { + /* +-- +2.7.4 + |