Got it.
will investigate asap
On Wed, Sep 2, 2020 at 3:42 AM kernel test robot <l...@intel.com> wrote:
>
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 70f06a871f5d40ca8f977eb412358ab03b6804da ("[PATCH v3 3/3] dyndbg: fix
> problem parsing format="foo bar"")
> url:
> https://github.com/0day-ci/linux/commits/Jim-Cromie/dyndbg-cleanups-for-5-9/20200901-022403
> base: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git
> f75aef392f869018f78cfedf3c320a6b3fcfda6b
>
> in testcase: kernel-selftests
> with following parameters:
>
> group: kselftests-livepatch
>
> test-description: The kernel contains a set of "self tests" under the
> tools/testing/selftests/ directory. These are intended to be small unit tests
> to exercise individual code paths in the kernel.
> test-url: https://www.kernel.org/doc/Documentation/kselftest.txt
>
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 8G
>
> caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):
>
>
> +------------------------------------------+------------+------------+
> | | 12aeaa9439 | 70f06a871f |
> +------------------------------------------+------------+------------+
> | boot_successes | 6 | 2 |
> | boot_failures | 0 | 4 |
> | kernel_BUG_at_lib/dynamic_debug.c | 0 | 4 |
> | invalid_opcode:#[##] | 0 | 4 |
> | RIP:ddebug_exec_query | 0 | 4 |
> | Kernel_panic-not_syncing:Fatal_exception | 0 | 4 |
> +------------------------------------------+------------+------------+
>
>
> If you fix the issue, kindly add following tag
> Reported-by: kernel test robot <l...@intel.com>
>
>
> [ 78.796907] kernel BUG at lib/dynamic_debug.c:267!
> [ 78.799930] invalid opcode: 0000 [#1] PREEMPT SMP PTI
> [ 78.801632] CPU: 1 PID: 1068 Comm: test-livepatch. Tainted: G
> K 5.9.0-rc3-00003-g70f06a871f5d4 #1
> [ 78.803877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
> 1.12.0-1 04/01/2014
> [ 78.805929] RIP: 0010:ddebug_exec_query+0x684/0x760
> [ 78.807642] Code: 0f 85 c0 08 00 00 4c 89 7c 24 28 e9 2d fc ff ff 4c 89 fe
> 48 8d 7c 24 10 e8 a9 f8 ff ff 85 c0 0f 84 18 fc ff ff e9 c1 07 00 00 <0f> 0b
> 8b 15 ac 37 e2 02 85 d2 0f 85 c1 00 00 00 45 31 e4 48 c7 c6
> [ 78.812169] RSP: 0018:ffffb325411c7d78 EFLAGS: 00010246
> [ 78.815411] RAX: 000000000000003d RBX: ffff9f4dab69286c RCX:
> 0000000000000000
> [ 78.821166] RDX: 000000000000003d RSI: ffff9f4dab692868 RDI:
> ffff9f4dab69286c
> [ 78.823160] RBP: 0000000000000004 R08: ffff9f4dab69286e R09:
> 0000000000000001
> [ 78.825172] R10: 0000000000000000 R11: 0000000000000246 R12:
> 0000000000000004
> [ 78.827212] R13: 0000000000000004 R14: 0000000000000000 R15:
> 0000000000000000
> [ 78.829228] FS: 00007f024c29c740(0000) GS:ffff9f4e77d00000(0000)
> knlGS:0000000000000000
> [ 78.831343] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 78.833243] CR2: 00007f024c45c8a0 CR3: 0000000168360000 CR4:
> 00000000000406e0
> [ 78.835312] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 78.837371] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
> 0000000000000400
> [ 78.839398] Call Trace:
> [ 78.840935] ? __might_fault+0x36/0x80
> [ 78.842574] ddebug_exec_queries+0x6a/0x100
> [ 78.844322] ddebug_proc_write+0x4e/0x80
> [ 78.845985] full_proxy_write+0x56/0x80
> [ 78.847621] vfs_write+0xec/0x240
> [ 78.849189] ksys_write+0x68/0xe0
> [ 78.850738] do_syscall_64+0x33/0x40
> [ 78.852347] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [ 78.854106] RIP: 0033:0x7f024c389504
> [ 78.855634] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00
> 00 00 00 48 8d 05 f9 61 0d 00 8b 00 85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d
> 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89 f5 53
> [ 78.860364] RSP: 002b:00007fff5962d2b8 EFLAGS: 00000246 ORIG_RAX:
> 0000000000000001
> [ 78.864609] RAX: ffffffffffffffda RBX: 00000000000000bc RCX:
> 00007f024c389504
> [ 78.866696] RDX: 00000000000000bc RSI: 00005582ce63dcd0 RDI:
> 0000000000000001
> [ 78.868751] RBP: 00005582ce63dcd0 R08: fffffffffffffff0 R09:
> 00007f024c419e80
> [ 78.870832] R10: 00005582ce63dd8c R11: 0000000000000246 R12:
> 00007f024c45b760
> [ 78.872933] R13: 00000000000000bc R14: 00007f024c456760 R15:
> 00000000000000bc
> [ 78.875077] Modules linked in: intel_rapl_msr intel_rapl_common snd_pcm
> sr_mod cdrom sg crct10dif_pclmul ppdev crc32_pclmul snd_timer bochs_drm
> crc32c_intel ata_generic ghash_clmulni_intel snd pata_acpi drm_vram_helper
> aesni_intel drm_ttm_helper crypto_simd ttm cryptd ata_piix glue_helper
> soundcore joydev pcspkr serio_raw parport_pc libata parport ipmi_devintf
> ipmi_msghandler floppy i2c_piix4 ip_tables [last unloaded:
> test_klp_atomic_replace]
> [ 78.889926] ---[ end trace aae1acea69a78e4f ]---
>
>
> To reproduce:
>
> # build kernel
> cd linux
> cp config-5.9.0-rc3-00003-g70f06a871f5d4 .config
> make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare
> modules_prepare bzImage
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> bin/lkp qemu -k <bzImage> job-script # job-script is attached in this
> email
>
>
>
> Thanks,
> lkp
>
