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Message-ID: <20160627062148.GK16713@yexl-desktop>
Date: Mon, 27 Jun 2016 14:21:48 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Andy Lutomirski <luto@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Andy Lutomirski <luto@...capital.net>, lkp@...org
Subject: [fork] fa0c96ab2d: BUG: unable to handle kernel NULL pointer
dereference at 0000000000000008
FYI, we noticed the following commit:
https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/vmap_stack
commit fa0c96ab2d9c97a1ac47b4f7ed7199f1eb143322 ("fork: Cache two thread stacks per cpu if CONFIG_VMAP_STACK is set")
on test machine: 1 threads qemu-system-x86_64 -enable-kvm -cpu Westmere with 320M memory
caused below changes:
+------------------------------------------+------------+------------+
| | a550c94136 | fa0c96ab2d |
+------------------------------------------+------------+------------+
| boot_successes | 0 | 0 |
| boot_failures | 56 | 54 |
| BUG:unable_to_handle_kernel | 50 | 53 |
| Oops | 27 | 21 |
| RIP:__schedule | 10 | |
| RIP:number | 5 | 1 |
| backtrace:do_wait | 9 | |
| backtrace:SyS_wait4 | 9 | |
| PANIC:double_fault | 28 | 32 |
| RIP:symbol_string | 11 | 28 |
| Kernel_panic-not_syncing:Machine_halted | 28 | 32 |
| WARNING:at_mm/vmalloc.c:#__vunmap | 2 | |
| RIP:io_serial_out | 8 | |
| Kernel_panic-not_syncing:Fatal_exception | 24 | 20 |
| RIP:queued_spin_lock_slowpath | 1 | |
| RIP:io_serial_in | 4 | 1 |
| RIP:vmalloc_fault | 2 | 1 |
| backtrace:smpboot_thread_fn | 2 | |
| RIP:__lock_acquire | 13 | 12 |
| backtrace:async_run_entry_fn | 14 | 13 |
| INFO:trying_to_register_non-static_key | 1 | |
| RIP:do_raw_spin_trylock | 1 | |
| BUG:kernel_test_hang | 1 | |
| backtrace:compat_SyS_wait4 | 2 | |
| RIP:cont_add | 1 | |
| backtrace:core_sys_select | 1 | |
| backtrace:SyS_select | 1 | |
| backtrace:vfs_read | 1 | |
| backtrace:SyS_read | 1 | |
| RIP:no_context | 1 | |
| invoked_oom-killer:gfp_mask=0x | 1 | |
| Mem-Info | 1 | |
| Out_of_memory:Kill_process | 1 | |
| BUG:Bad_page_map_in_process | 1 | |
| backtrace:oom_reaper | 1 | |
| RIP:format_decode | 0 | 1 |
| RIP:vsnprintf | 0 | 1 |
| BUG:kernel_boot_hang | 0 | 1 |
| RIP:ptep_set_access_flags | 0 | 1 |
| RIP:do_raw_spin_lock | 0 | 1 |
| backtrace:schedule_timeout | 0 | 1 |
+------------------------------------------+------------+------------+
[ 14.488344] Write protecting the kernel read-only data: 20480k
[ 14.490449] Freeing unused kernel memory: 948K (ffff880001d13000 - ffff880001e00000)
[ 14.509877] Freeing unused kernel memory: 384K (ffff8800023a0000 - ffff880002400000)
[ 14.566870] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[ 14.589161] IP: [<ffffffff8107c809>] do_exit+0x8a9/0x958
[ 14.589906] PGD f29f067 PUD f2aa067 PMD 0
[ 14.590531] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.591621] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.592395] PGD f29f067 PUD f2aa067 PMD 0
[ 14.593028] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.594134] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.595079] PGD f29f067 PUD f2aa067 PMD 0
[ 14.595835] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.597169] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.598111] PGD f29f067 PUD f2aa067 PMD 0
[ 14.598866] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.600137] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.619127] PGD f29f067 PUD f2aa067 PMD 0
[ 14.619856] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.621195] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.622145] PGD f29f067 PUD f2aa067 PMD 0
[ 14.622845] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.624059] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.624914] PGD f29f067 PUD f2aa067 PMD 0
[ 14.625607] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.626905] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.627791] PGD f29f067 PUD f2aa067 PMD 0
[ 14.646553] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.647925] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.648805] PGD f29f067 PUD f2aa067 PMD 0
[ 14.649429] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.650620] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.651477] PGD f29f067 PUD f2aa067 PMD 0
[ 14.652168] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.653374] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.654227] PGD f29f067 PUD f2aa067 PMD 0
[ 14.654906] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.674170] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.675147] PGD f29f067 PUD f2aa067 PMD 0
[ 14.675912] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.677243] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.678192] PGD f29f067 PUD f2aa067 PMD 0
[ 14.678905] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.680120] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.680971] PGD f29f067 PUD f2aa067 PMD 0
[ 14.681657] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.682861] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.701842] PGD f29f067 PUD f2aa067 PMD 0
[ 14.702613] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.703952] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.704907] PGD f29f067 PUD f2aa067 PMD 0
[ 14.705667] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.706912] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.707773] PGD f29f067 PUD f2aa067 PMD 0
[ 14.708460] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.709662] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.710552] PGD f29f067 PUD f2aa067 PMD 0
[ 14.741364] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.742708] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.743653] PGD f29f067 PUD f2aa067 PMD 0
[ 14.744409] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.745743] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.746696] PGD f29f067 PUD f2aa067 PMD 0
[ 14.747462] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.771833] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.772792] PGD f29f067 PUD f2aa067 PMD 0
[ 14.773565] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.774912] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.775873] PGD f29f067 PUD f2aa067 PMD 0
[ 14.776646] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.777986] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.799988] PGD f29f067 PUD f2aa067 PMD 0
[ 14.800757] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.802105] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.803060] PGD f29f067 PUD f2aa067 PMD 0
[ 14.803814] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.805163] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.826139] PGD f29f067 PUD f2aa067 PMD 0
[ 14.826825] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.828031] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.828972] PGD f29f067 PUD f2aa067 PMD 0
[ 14.829734] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.831070] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.832022] PGD f29f067 PUD f2aa067 PMD 0
[ 14.832779] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.855339] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.859358] PGD f29f067 PUD f2aa067 PMD 0
[ 14.860010] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.866515] IP: [<ffffffff8103d7fd>] no_context+0x2c5/0x382
[ 14.870436] PGD f29f067 PUD f2aa067 PMD 0
[ 14.874316] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 14.877654] IP:
[ 14.877893] PANIC: double fault, error_code: 0x0
[ 14.880793] CPU: 0 PID: 149 Comm: mount Not tainted 4.7.0-rc4-00260-gfa0c96a #2
[ 14.882944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 14.891703] task: ffff88000f1e5b00 ti: ffff88000f1e5b00 task.ti: ffff88000f1e5b00
[ 14.894869] RIP: 0010:[<ffffffff814003ee>] [<ffffffff814003ee>] symbol_string+0x39/0x68
[ 14.898367] RSP: 0000:ffffc900001d3fd0 EFLAGS: 00010083
[ 14.900249] RAX: 0000000000000053 RBX: ffffffff832c6196 RCX: ffff0a00ffffff05
[ 14.902452] RDX: ffffffff8103d7fd RSI: ffffffff8103d7fd RDI: ffffc900001d3fd1
[ 14.904593] RBP: ffffc900001d40d8 R08: ffffffff82217370 R09: 0000000000000020
[ 14.906701] R10: 00000000001d4200 R11: ffffffff832c6183 R12: ffffffff832c6560
[ 14.914898] R13: ffff0a00ffffff05 R14: 00000000ffff0a00 R15: 00000000000003e0
[ 14.917045] FS: 0000000000000000(0000) GS:ffff880013800000(0000) knlGS:0000000000000000
[ 14.920560] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 14.922558] CR2: ffffc900001d3fc8 CR3: 000000000f2b3000 CR4: 00000000000006f0
[ 14.929938] Stack:
[ 14.931428]
[ 14.931634] Call Trace:
[ 14.931957] <UNK>
[ 14.932338] Code: fb 48 89 d6 49 89 cd 48 8d bd f9 fe ff ff 48 81 ec f0 00 00 00 41 8a 00 3c 42 75 07 e8 3b 53 cd ff eb 14 3c 66 74 0b 3c 73 74 07 <e8> 0b 53 cd ff eb 05 e8 16 53 cd ff 48 8d 95 f9 fe ff ff 4c 89
[ 14.940956] Kernel panic - not syncing: Machine halted.
[ 14.941876] Kernel Offset: disabled
Elapsed time: 30
FYI, raw QEMU command line is:
qemu-system-x86_64 -enable-kvm -cpu Westmere -kernel /pkg/linux/x86_64-acpi-redef/gcc-6/fa0c96ab2d9c97a1ac47b4f7ed7199f1eb143322/vmlinuz-4.7.0-rc4-00260-gfa0c96a -append 'root=/dev/ram0 user=lkp job=/lkp/scheduled/vm-kbuild-yocto-ia32-9/rand_boot-1-yocto-minimal-i386.cgz-x86_64-acpi-redef-fa0c96ab2d9c97a1ac47b4f7ed7199f1eb143322-20160626-39885-prwrwn-1.yaml ARCH=x86_64 kconfig=x86_64-acpi-redef branch=linux-devel/devel-catchup-201606260900 commit=fa0c96ab2d9c97a1ac47b4f7ed7199f1eb143322 BOOT_IMAGE=/pkg/linux/x86_64-acpi-redef/gcc-6/fa0c96ab2d9c97a1ac47b4f7ed7199f1eb143322/vmlinuz-4.7.0-rc4-00260-gfa0c96a max_uptime=600 RESULT_ROOT=/result/boot/1/vm-kbuild-yocto-ia32/yocto-minimal-i386.cgz/x86_64-acpi-redef/gcc-6/fa0c96ab2d9c97a1ac47b4f7ed7199f1eb143322/0 LKP_SERVER=inn earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal rw ip=::::vm-kbuild-yocto-ia32-9::dhcp drbd.minor_count=8' -initrd /fs/sda1/initrd-vm-kbuild-yocto-ia32-9 -m 320 -smp 1 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sda1/disk0-vm-kbuild-yocto-ia32-9,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-vm-kbuild-yocto-ia32-9 -serial file:/dev/shm/kboot/serial-vm-kbuild-yocto-ia32-9 -daemonize -display none -monitor null
Thanks,
Xiaolong
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