Greetings,

0day kernel testing robot got the below dmesg and the first bad commit is

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/pti

commit 28a54ccb4d286b31b1759cf325731f44ef14222d Merge: 706d51681d636 2140e26f3d98e Author: Thomas Gleixner tglx@linutronix.de AuthorDate: Sun Aug 5 22:26:02 2018 +0200 Commit: Thomas Gleixner tglx@linutronix.de CommitDate: Sun Aug 5 22:26:02 2018 +0200

Merge branch 'x86/pti-urgent' into x86/pti

Integrate the PTI Global bit fixes which conflict with the 32bit PTI support.

Signed-off-by: Thomas Gleixner tglx@linutronix.de

706d51681d x86/speculation: Support Enhanced IBRS on future CPUs 2140e26f3d x86/mm/init: Remove freed kernel image areas from alias mapping 28a54ccb4d Merge branch 'x86/pti-urgent' into x86/pti 9c2c950edb Merge branch 'x86/vdso' +------------------------------------------+------------+------------+------------+------------+ | | 706d51681d | 2140e26f3d | 28a54ccb4d | 9c2c950edb | +------------------------------------------+------------+------------+------------+------------+ | boot_successes | 58 | 58 | 0 | 0 | | boot_failures | 0 | 0 | 22 | 18 | | BUG:unable_to_handle_kernel | 0 | 0 | 22 | 18 | | Oops:#[##] | 0 | 0 | 22 | 18 | | EIP:get_page_from_freelist | 0 | 0 | 13 | 16 | | EIP:copy_page_to_iter | 0 | 0 | 7 | 11 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 0 | 22 | 18 | | EIP:handle_mm_fault | 0 | 0 | 5 | | | EIP:wp_page_copy | 0 | 0 | 4 | 2 | +------------------------------------------+------------+------------+------------+------------+

[ 2.562080] random: get_random_bytes called from prandom_seed_full_state+0x2c/0xa0 with crng_init=0 [ 2.565719] Freeing unused kernel image memory: 644K [ 2.573117] Write protecting the kernel text: 7668k [ 2.575673] Write protecting the kernel read-only data: 2392k [ 2.577149] rodata_test: all tests were successful [ 2.593639] BUG: unable to handle kernel paging request at c1aa2000 [ 2.595231] *pde = 1661e163 *pte = 01aa2062 [ 2.596351] Oops: 0002 [#1] SMP PTI [ 2.597312] CPU: 0 PID: 1 Comm: init Not tainted 4.18.0-rc8-00056-g28a54cc #2 [ 2.599027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 [ 2.601109] EIP: get_page_from_freelist+0x20a/0xb20 [ 2.602360] Code: e4 eb 54 90 8d 74 26 00 f7 c7 02 00 00 00 0f 85 14 08 00 00 f7 c7 04 00 00 00 0f 85 f7 07 00 00 89 d1 31 c0 c1 e9 02 f6 c2 02 <f3> ab 74 08 66 c7 07 00 00 83 c7 02 f6 c2 01 74 03 c6 07 00 89 f0 [ 2.606778] EAX: 00000000 EBX: d582c950 ECX: 00000400 EDX: 00001000 [ 2.608317] ESI: c1aa2000 EDI: c1aa2000 EBP: d50b1c70 ESP: d50b1bf8 [ 2.609843] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010246 [ 2.611489] CR0: 80050033 CR2: c1aa2000 CR3: 1662e000 CR4: 000006d0 [ 2.613033] Call Trace: [ 2.613777] __alloc_pages_nodemask+0xa8/0xb70 [ 2.614935] ? is_module_text_address+0xf/0x20 [ 2.616099] ? kernel_text_address+0x38/0x80 [ 2.617214] ? __kernel_text_address+0xb/0x30 [ 2.618357] ? unwind_get_return_address+0x1e/0x40 [ 2.619592] ? __save_stack_trace+0x6e/0xb0 [ 2.620692] ? deactivate_slab+0x2ae/0x4f0 [ 2.621934] handle_mm_fault+0xa9f/0xd50 [ 2.623007] __do_page_fault+0x189/0x470 [ 2.624057] ? kvm_disable_steal_time+0x20/0x20 [ 2.625368] do_page_fault+0x21/0x30 [ 2.626342] do_async_page_fault+0x14/0x80 [ 2.627430] common_exception+0x110/0x116 [ 2.628498] EIP: copy_page_to_iter+0xe3/0x3d0 [ 2.629629] Code: 85 db 8d 4c 1f ff 0f 84 ce 00 00 00 39 cf 77 24 89 fa 31 ff eb 0f 90 81 c2 00 10 00 00 39 d1 0f 82 9a 00 00 00 8d 76 00 89 f8 <c6> 02 00 8d 76 00 85 c0 74 e3 8b 7d e8 8b 45 e4 e8 18 82 d0 ff 8b [ 2.634080] EAX: 00000000 EBX: 0000014d ECX: b7f1e14c EDX: b7f1e000 [ 2.635614] ESI: d50b1ef4 EDI: 00000000 EBP: d50b1e48 ESP: d50b1e20 [ 2.637156] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010246 [ 2.638796] ? kvm_disable_steal_time+0x20/0x20 [ 2.640122] generic_file_buffered_read+0x35e/0x700 [ 2.641369] generic_file_read_iter+0x157/0x1b0 [ 2.642478] __vfs_read+0xf2/0x160 [ 2.643283] vfs_read+0x8f/0x140 [ 2.643977] ksys_read+0x40/0xa0 [ 2.644582] sys_read+0x11/0x20 [ 2.645455] do_int80_syscall_32+0x67/0x110 [ 2.646165] entry_INT80_32+0xc3/0xc3 [ 2.646824] EIP: 0xb7f221b2 [ 2.647357] Code: 89 c2 31 c0 89 d7 f3 aa 8b 44 24 1c 89 30 c6 40 04 00 83 c4 2c 89 f0 5b 5e 5f 5d c3 90 90 90 90 90 90 90 90 90 90 90 90 cd 80 <c3> 8d b6 00 00 00 00 8d bc 27 00 00 00 00 8b 1c 24 c3 8d b6 00 00 [ 2.650296] EAX: ffffffda EBX: 00000007 ECX: b7f1e000 EDX: 00001000 [ 2.651296] ESI: 005415d8 EDI: 0000014d EBP: 00542168 ESP: bff80924 [ 2.652305] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246 [ 2.653365] Modules linked in: [ 2.653994] CR2: 00000000c1aa2000 [ 2.654570] ---[ end trace af6f08788fbeeb09 ]--- [ 2.655409] EIP: get_page_from_freelist+0x20a/0xb20

# HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD git bisect start 1495f1e4b4ee21fe5c3cdfeb68f195f426369f88 1ffaddd029c867d134a1dde39f540dcc8c52e274 -- git bisect bad 6fb7bfa28535f092d9e239192ad5760ccae51bbd # 12:56 B 1 12 1 1 Merge 'lpieralisi-pci/pci/mobiveil' into devel-hourly-2018080608 git bisect bad c3c97687aae9f301dff01d6d731d28d5a4089dc2 # 13:04 B 3 4 3 3 Merge 'linux-review/Michal-Zylowski/checkpatch-Check-for-space-after-else-keyword/20180803-071308' into devel-hourly-2018080608 git bisect bad 606460fc5ac24a48abc4e943ba611b591a8ae52f # 13:14 B 3 2 3 3 Merge 'linux-review/Christoph-Hellwig/RISC-V-remove-timer-leftovers/20180805-005325' into devel-hourly-2018080608 git bisect bad f826c2fec01d5b9ce223a9a3475025b1bae58d81 # 13:29 B 2 4 2 2 Merge 'linux-review/Alexandru-Gagniuc/ALSA-hda-realtek-Add-mute-LED-quirk-for-HP-Spectre-x360/20180805-172627' into devel-hourly-2018080608 git bisect bad 7562fcc8adf6c858096077734c12dc75a9e620ac # 13:37 B 4 11 4 4 Merge 'f2fs/dev-test' into devel-hourly-2018080608 git bisect bad 822beb31f8617c76f773b67250d2218a85c0f6cb # 13:55 B 9 6 9 11 Merge 'tip/master' into devel-hourly-2018080608 git bisect good 66967cf768a40c827801a067c7e7ad36b16f6bcd # 14:11 G 18 0 0 0 Merge 'gpio/devel' into devel-hourly-2018080608 git bisect good 4ec44e4da5d00bd5199ae65e8b91511f95678bc1 # 14:23 G 17 0 0 0 Merge 'linux-review/Alexandru-Gheorghe/Add-helper-for-plane-reset/20180806-021828' into devel-hourly-2018080608 git bisect good 486ea23287dddacfc220b343a9893480f94e8c98 # 14:37 G 18 0 0 0 Merge 'linux-review/zhong-jiang/drivers-staging-Remove-some-unneeded-semicolon/20180806-064846' into devel-hourly-2018080608 git bisect good 5fc74ce12611abb08bd6245418a9d078a56731bd # 14:54 G 18 0 0 0 Merge branch 'perf/core' git bisect good 94570b83310087059d5cacf6a83fbc56c82d88f1 # 15:07 G 18 0 0 0 Merge branch 'x86/cache' git bisect bad 28a54ccb4d286b31b1759cf325731f44ef14222d # 15:16 B 3 3 3 5 Merge branch 'x86/pti-urgent' into x86/pti git bisect good f94560cd6b5117f8913f4c42f4d9a405c26ddc1c # 15:28 G 18 0 0 0 x86/mm/pti: Clone CPU_ENTRY_AREA on PMD level on x86_32 git bisect good b2b7d986a89b6c94b1331a909de1217214fb08c1 # 15:45 G 18 0 0 0 x86/pti: Check the return value of pti_user_pagetable_walk_p4d() git bisect good fdf82a7856b32d905c39afc85e34364491e46346 # 15:59 G 17 0 0 0 x86/speculation: Protect against userspace-userspace spectreRSB git bisect good 9f515cdb411ef34f1aaf4c40bb0c932cf6db5de1 # 16:08 G 18 0 0 0 x86/mm/init: Pass unconverted symbol addresses to free_init_pages() git bisect good 2140e26f3d98e615c60c5f6a97d8421a077d61eb # 16:21 G 18 0 0 0 x86/mm/init: Remove freed kernel image areas from alias mapping git bisect good 706d51681d636a0c4a5ef53395ec3b803e45ed4d # 16:33 G 18 0 0 0 x86/speculation: Support Enhanced IBRS on future CPUs # first bad commit: [28a54ccb4d286b31b1759cf325731f44ef14222d] Merge branch 'x86/pti-urgent' into x86/pti git bisect good 706d51681d636a0c4a5ef53395ec3b803e45ed4d # 16:37 G 54 0 0 0 x86/speculation: Support Enhanced IBRS on future CPUs git bisect good 2140e26f3d98e615c60c5f6a97d8421a077d61eb # 16:41 G 54 0 0 0 x86/mm/init: Remove freed kernel image areas from alias mapping # extra tests with debug options git bisect bad 28a54ccb4d286b31b1759cf325731f44ef14222d # 16:51 B 0 7 23 1 Merge branch 'x86/pti-urgent' into x86/pti # extra tests on HEAD of linux-devel/devel-hourly-2018080608 git bisect bad 1495f1e4b4ee21fe5c3cdfeb68f195f426369f88 # 16:51 B 0 7 31 6 0day head guard for 'devel-hourly-2018080608' # extra tests on tree/branch tip/x86/pti git bisect bad 28a54ccb4d286b31b1759cf325731f44ef14222d # 16:52 B 0 13 37 9 Merge branch 'x86/pti-urgent' into x86/pti # extra tests on tree/branch tip/master git bisect bad 9c2c950edbfc4616a4fdfef1d43562753a7271cd # 17:03 B 2 16 2 2 Merge branch 'x86/vdso'

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