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Message-ID: <202305241757.57c30887-yujie.liu@intel.com>
Date: Thu, 25 May 2023 01:37:13 +0800
From: kernel test robot <yujie.liu@...el.com>
To: "Paul E. McKenney" <paulmck@...nel.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
<linux-kernel@...r.kernel.org>, <rcu@...r.kernel.org>
Subject: [paulmck-rcu:dev.2023.05.20a] [rcuscale] 812195e4f7:
BUG:kernel_NULL_pointer_dereference,address
Hello,
kernel test robot noticed "BUG:kernel_NULL_pointer_dereference,address" on:
commit: 812195e4f70ef0e9fc68127355c553c537749546 ("rcuscale: Measure grace-period kthread CPU time")
https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2023.05.20a
in testcase: boot
compiler: clang-14
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+---------------------------------------------+------------+------------+
| | 2393139b67 | 812195e4f7 |
+---------------------------------------------+------------+------------+
| boot_successes | 8 | 0 |
| boot_failures | 0 | 8 |
| BUG:kernel_NULL_pointer_dereference,address | 0 | 8 |
| Oops:#[##] | 0 | 8 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 8 |
+---------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202305241757.57c30887-yujie.liu@intel.com
[ 629.144501][ T35] rcu-scale: rcu_scale_writer 0 has 100 measurements
[ 629.181077][ T35] Dumping ftrace buffer:
[ 629.181441][ T35] (ftrace buffer empty)
[ 629.181680][ T35] rcu-scale: Test complete
[ 629.182322][ T33] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 629.182708][ T33] #PF: supervisor instruction fetch in kernel mode
[ 629.183027][ T33] #PF: error_code(0x0010) - not-present page
[ 629.183322][ T33] PGD 13d085067 P4D 13d085067 PUD 0
[ 629.183589][ T33] Oops: 0010 [#1] KASAN
[ 629.183806][ T33] CPU: 0 PID: 33 Comm: rcu_scale_shutd Not tainted 6.4.0-rc1-00088-g812195e4f70e #1 19cf2b1999b45c3d98eb981eba187eee27b0ad34
[ 629.184464][ T33] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 629.184967][ T33] RIP: 0010:0x0
[ 629.185152][ T33] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
Code starting with the faulting instruction
===========================================
[ 629.185523][ T33] RSP: 0000:ffffc90000c2fe80 EFLAGS: 00010246
[ 629.185869][ T33] RAX: 1ffffffff0e6b100 RBX: ffffffff87358800 RCX: ffffffff8998c003
[ 629.186348][ T33] RDX: dffffc0000000000 RSI: ffff888114b7b140 RDI: ffffffff850e7a8d
[ 629.186741][ T33] RBP: ffff88813b488560 R08: dffffc0000000000 R09: fffffbfff121ceab
[ 629.187135][ T33] R10: dffff7fff121ceac R11: 1ffffffff121ceaa R12: dffffc0000000000
[ 629.187550][ T33] R13: ffffc9000001fa60 R14: dffffc0000000000 R15: ffff888114b7b408
[ 629.187941][ T33] FS: 0000000000000000(0000) GS:ffffffff86ef9000(0000) knlGS:0000000000000000
[ 629.188391][ T33] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 629.188717][ T33] CR2: ffffffffffffffd6 CR3: 000000013d12f000 CR4: 00000000000406f0
[ 629.189112][ T33] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 629.189503][ T33] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 629.189891][ T33] Call Trace:
[ 629.190065][ T33] <TASK>
[ 629.190213][ T33] rcu_scale_cleanup (kernel/rcu/rcuscale.c:817)
[ 629.190465][ T33] rcu_scale_shutdown (kernel/rcu/rcuscale.c:905)
[ 629.190709][ T33] ? wake_bit_function (kernel/sched/wait.c:418)
[ 629.190973][ T33] kthread (kernel/kthread.c:380)
[ 629.191185][ T33] ? rcu_scale_cleanup (kernel/rcu/rcuscale.c:901)
[ 629.191442][ T33] ? kthread_unuse_mm (kernel/kthread.c:332)
[ 629.191695][ T33] ret_from_fork (arch/x86/entry/entry_64.S:314)
[ 629.191920][ T33] </TASK>
[ 629.192075][ T33] Modules linked in:
[ 629.192278][ T33] CR2: 0000000000000000
[ 629.192498][ T33] ---[ end trace 0000000000000000 ]---
[ 629.192762][ T33] RIP: 0010:0x0
[ 629.192937][ T33] Code: Unable to access opcode bytes at 0xffffffffffffffd6.
Code starting with the faulting instruction
===========================================
[ 629.193292][ T33] RSP: 0000:ffffc90000c2fe80 EFLAGS: 00010246
[ 629.193586][ T33] RAX: 1ffffffff0e6b100 RBX: ffffffff87358800 RCX: ffffffff8998c003
[ 629.193967][ T33] RDX: dffffc0000000000 RSI: ffff888114b7b140 RDI: ffffffff850e7a8d
[ 629.194347][ T33] RBP: ffff88813b488560 R08: dffffc0000000000 R09: fffffbfff121ceab
[ 629.194727][ T33] R10: dffff7fff121ceac R11: 1ffffffff121ceaa R12: dffffc0000000000
[ 629.195107][ T33] R13: ffffc9000001fa60 R14: dffffc0000000000 R15: ffff888114b7b408
[ 629.195488][ T33] FS: 0000000000000000(0000) GS:ffffffff86ef9000(0000) knlGS:0000000000000000
[ 629.195914][ T33] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 629.196230][ T33] CR2: ffffffffffffffd6 CR3: 000000013d12f000 CR4: 00000000000406f0
[ 629.196628][ T33] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 629.197020][ T33] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 629.197410][ T33] Kernel panic - not syncing: Fatal exception
[ 629.197709][ T33] Kernel Offset: disabled
To reproduce:
# build kernel
cd linux
cp config-6.4.0-rc1-00088-g812195e4f70e .config
make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=clang-14 CC=clang-14 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz 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.
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
View attachment "config-6.4.0-rc1-00088-g812195e4f70e" of type "text/plain" (163247 bytes)
View attachment "job-script" of type "text/plain" (5004 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (59144 bytes)
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