linux-kernel - [dyndbg] 70f06a871f: kernel_BUG_at_lib/dynamic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20200902074124.GP4299@shao2-debian>
Date:   Wed, 2 Sep 2020 15:41:24 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jim Cromie <jim.cromie@...il.com>
Cc:     jbaron@...mai.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, Jim Cromie <jim.cromie@...il.com>,
        0day robot <lkp@...el.com>, lkp@...ts.01.org
Subject: [dyndbg] 70f06a871f: kernel_BUG_at_lib/dynamic_debug.c

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 <lkp@...el.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


View attachment "config-5.9.0-rc3-00003-g70f06a871f5d4" of type "text/plain" (209877 bytes)

View attachment "job-script" of type "text/plain" (5635 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (16956 bytes)