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Date: Thu, 22 Oct 2015 08:35:51 +0800
From: kernel test robot <ying.huang@...ux.intel.com>
TO: Borislav Petkov <bp@...e.de>
CC: 0day robot <fengguang.wu@...el.com>
Subject: [lkp] [x86] 0941ca402a: BUG: unable to handle kernel NULL pointer
dereference at (null)
FYI, we noticed the below changes on
https://github.com/0day-ci/linux Borislav-Petkov/x86-Kill-notsc/20151018-222323
commit 0941ca402ab984dbc24d27df4def1a0aa4f082b1 ("x86: Kill notsc")
+--------------------------------------------------------+----------+------------+
| | v4.3-rc5 | 0941ca402a |
+--------------------------------------------------------+----------+------------+
| boot_successes | 3515 | 17 |
| boot_failures | 50 | 8 |
| invoked_oom-killer:gfp_mask=0x | 17 | |
| RIP:native_queued_spin_lock_slowpath | 7 | |
| Kernel_panic-not_syncing:softlockup:hung_tasks | 7 | |
| backtrace:lock_torture_writer | 7 | |
| drm:gen8_irq_handler[i915]] | 25 | |
| Mem-Info | 16 | |
| Out_of_memory:Kill_process | 16 | |
| backtrace:SyS_ioctl | 10 | |
| backtrace:SyS_write | 4 | |
| backtrace:do_wait | 2 | |
| backtrace:SyS_wait4 | 2 | |
| backtrace:_do_fork | 1 | |
| backtrace:SyS_clone | 1 | |
| backtrace:do_execveat_common | 1 | |
| backtrace:SyS_execve | 1 | |
| backtrace:vfs_read | 1 | |
| backtrace:SyS_read | 1 | |
| WARNING:at_fs/xfs/xfs_file.c:#xfs_file_dio_aio_write() | 3 | |
| backtrace:vfs_write | 3 | |
| BUG:kernel_early-boot_hang | 5 | |
| BUG:kernel_test_crashed | 2 | |
| BUG:kernel_test_oversize | 2 | |
| BUG:unable_to_handle_kernel | 0 | 8 |
| Oops | 0 | 8 |
| RIP:native_sched_clock | 0 | 8 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 8 |
| backtrace:sched_clock | 0 | 8 |
| backtrace:init_idle | 0 | 8 |
| backtrace:sched_init | 0 | 8 |
+--------------------------------------------------------+----------+------------+
[ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] Memory: 12095664K/12522424K available (8908K kernel code, 1731K rwdata, 4068K rodata, 1872K init, 1884K bss, 426760K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=24, Nodes=2
[ 0.000000] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 0.000000] IP: [<ffffffff8101eec0>] native_sched_clock+0x30/0x70
[ 0.000000] PGD 0
[ 0.000000] Oops: 0000 [#1] SMP
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.3.0-rc5-00001-g0941ca4 #1
[ 0.000000] Hardware name: Intel Corporation S5520UR/S5520UR, BIOS S5500.86B.01.00.0050.050620101605 05/06/2010
[ 0.000000] task: ffffffff81cc2500 ti: ffffffff81cb0000 task.ti: ffffffff81cb0000
[ 0.000000] RIP: 0010:[<ffffffff8101eec0>] [<ffffffff8101eec0>] native_sched_clock+0x30/0x70
[ 0.000000] RSP: 0000:ffffffff81cb3ec0 EFLAGS: 00010046
[ 0.000000] RAX: 0000000000000000 RBX: ffffffff81cc2500 RCX: 0000004ccc5ef82e
[ 0.000000] RDX: 0000004c00000000 RSI: 0000000000000000 RDI: ffffffff81cc27f8
[ 0.000000] RBP: ffffffff81cb3ec0 R08: 0000000000000000 R09: ffff8801e9410240
[ 0.000000] R10: ffffffff81e521c0 R11: 0000000000010e00 R12: 0000000000000018
[ 0.000000] R13: ffff8801e9a17380 R14: ffffffff81cc2fc4 R15: 0000000000000000
[ 0.000000] FS: 0000000000000000(0000) GS:ffff8801e9a00000(0000) knlGS:0000000000000000
[ 0.000000] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 0.000000] CR2: 0000000000000000 CR3: 0000000001cbb000 CR4: 00000000000006b0
[ 0.000000] Stack:
[ 0.000000] ffffffff81cb3ed0 ffffffff8101ef7b ffffffff81cb3f10 ffffffff810a14ac
[ 0.000000] 0000000000000082 ffff88036fcd7380 0000000000000018 ffff88036fcd7530
[ 0.000000] 0000000000000018 0000000000017380 ffffffff81cb3f50 ffffffff81e9e9a4
[ 0.000000] Call Trace:
[ 0.000000] [<ffffffff8101ef7b>] sched_clock+0xb/0x10
[ 0.000000] [<ffffffff810a14ac>] init_idle+0x5c/0x1a0
[ 0.000000] [<ffffffff81e9e9a4>] sched_init+0x48e/0x4ed
[ 0.000000] [<ffffffff81e7ad5f>] start_kernel+0x235/0x463
[ 0.000000] [<ffffffff81e7a120>] ? early_idt_handler_array+0x120/0x120
[ 0.000000] [<ffffffff81e7a4d7>] x86_64_start_reservations+0x2a/0x2c
[ 0.000000] [<ffffffff81e7a60f>] x86_64_start_kernel+0x136/0x145
[ 0.000000] Code: 83 e4 f0 0f 31 48 c1 e2 20 48 89 d1 48 09 c1 65 ff 05 ad ce fe 7e 65 48 8b 35 bd 59 ff 7e 65 48 8b 05 bd 59 ff 7e 48 39 c6 75 17 <8b> 06 48 f7 e1 48 0f ac d0 0a 48 03 46 08 65 ff 0d 83 ce fe 7e
[ 0.000000] RIP [<ffffffff8101eec0>] native_sched_clock+0x30/0x70
[ 0.000000] RSP <ffffffff81cb3ec0>
[ 0.000000] CR2: 0000000000000000
[ 0.000000] ---[ end trace effcdd0592152294 ]---
[ 0.000000] Kernel panic - not syncing: Fatal exception
To reproduce:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
Thanks,
Ying Huang
View attachment "config-4.3.0-rc5-00001-g0941ca4" of type "text/plain" (141579 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (4168 bytes)
View attachment "job.yaml" of type "text/plain" (3674 bytes)
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