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Date: Thu, 30 Sep 2021 14:37:30 +0800 From: kernel test robot <oliver.sang@...el.com> To: Daniel Latypov <dlatypov@...gle.com> Cc: Shuah Khan <skhan@...uxfoundation.org>, David Gow <davidgow@...gle.com>, Brendan Higgins <brendanhiggins@...gle.com>, LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org, lkp@...el.com Subject: [kunit] 3b29021ddd: BUG:kernel_NULL_pointer_dereference,address Greeting, FYI, we noticed the following commit (built with clang-14): commit: 3b29021ddd10cfb6b2565c623595bd3b02036f33 ("kunit: tool: allow filtering test cases via glob") https://git.kernel.org/cgit/linux/kernel/git/shuah/linux-kselftest.git kunit in testcase: boot on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +--------------------------------------------------------------------------+------------+------------+ | | 2e53f56af3 | 3b29021ddd | +--------------------------------------------------------------------------+------------+------------+ | BUG:kernel_NULL_pointer_dereference,address | 0 | 22 | | Oops:#[##] | 0 | 23 | | EIP:strcmp | 0 | 20 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 22 | +--------------------------------------------------------------------------+------------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang@...el.com> [ 74.983767][ T243] BUG: kernel NULL pointer dereference, address: 00000000 [ 74.984577][ T243] #PF: supervisor read access in kernel mode [ 74.984946][ T243] #PF: error_code(0x0000) - not-present page [ 74.985316][ T243] *pde = 00000000 [ 74.985549][ T243] Oops: 0000 [#1] [ 74.985776][ T243] CPU: 0 PID: 243 Comm: kunit_try_catch Tainted: G W 5.15.0-rc1-00002-g3b29021ddd10 #1 [ 74.986494][ T243] EIP: strcmp+0xe/0x40 [ 74.986753][ T243] Code: 75 f7 31 c0 c4 04 5e 5f c4 04 5e 5f 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 00 55 89 e5 00 55 89 e5 89 c6 ac ae 89 c6 <ac> ae 75 f8 31 c0 75 f8 31 c0 0c 01 5e 5f 0c 01 5e 5f 90 90 90 90 [ 74.987988][ T243] EAX: 00000000 EBX: f53c0108 ECX: 00000001 EDX: c33a266c [ 74.988425][ T243] ESI: 00000000 EDI: c33a266c EBP: f52d3ee0 ESP: f52d3ed8 [ 74.988864][ T243] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010286 [ 74.989332][ T243] CR0: 80050033 CR2: 00000000 CR3: 03ec2000 CR4: 000406d0 [ 74.989771][ T243] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 74.990219][ T243] DR6: fffe0ff0 DR7: 00000400 [ 74.990505][ T243] Call Trace: [ 74.990708][ T243] filter_suites_test+0x319/0x340 [ 74.991021][ T243] ? kunit_binary_ptr_assert_format+0xc0/0xc0 [ 74.991394][ T243] ? trace_hardirqs_on+0x4f/0xc0 [ 74.991701][ T243] kunit_try_run_case+0x3c/0xc0 [ 74.992000][ T243] kunit_generic_run_threadfn_adapter+0x16/0x40 [ 74.992383][ T243] kthread+0x14c/0x180 [ 74.992634][ T243] ? kunit_try_catch_run+0x180/0x180 [ 74.992971][ T243] ? kthread_unuse_mm+0xc0/0xc0 [ 74.993269][ T243] ret_from_fork+0x1c/0x28 [ 74.993541][ T243] Modules linked in: [ 74.993779][ T243] CR2: 0000000000000000 [ 74.994045][ T243] ---[ end trace e46267553c50ccd5 ]--- [ 74.994391][ T243] EIP: strcmp+0xe/0x40 [ 74.994643][ T243] Code: 75 f7 31 c0 c4 04 5e 5f c4 04 5e 5f 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 00 55 89 e5 00 55 89 e5 89 c6 ac ae 89 c6 <ac> ae 75 f8 31 c0 75 f8 31 c0 0c 01 5e 5f 0c 01 5e 5f 90 90 90 90 [ 74.995853][ T243] EAX: 00000000 EBX: f53c0108 ECX: 00000001 EDX: c33a266c [ 74.996456][ T243] ESI: 00000000 EDI: c33a266c EBP: f52d3ee0 ESP: f52d3ed8 [ 74.997031][ T243] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010286 [ 74.997499][ T243] CR0: 80050033 CR2: 00000000 CR3: 03ec2000 CR4: 000406d0 [ 74.997937][ T243] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 74.998384][ T243] DR6: fffe0ff0 DR7: 00000400 [ 74.998670][ T243] Kernel panic - not syncing: Fatal exception [ 74.999042][ T243] Kernel Offset: disabled To reproduce: # build kernel cd linux cp config-5.15.0-rc1-00002-g3b29021ddd10 .config make HOSTCC=clang-14 CC=clang-14 ARCH=i386 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 # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang View attachment "config-5.15.0-rc1-00002-g3b29021ddd10" of type "text/plain" (143020 bytes) View attachment "job-script" of type "text/plain" (4736 bytes) Download attachment "dmesg.xz" of type "application/x-xz" (18736 bytes)
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