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Date: Fri, 30 Sep 2022 09:32:40 +0000
From: 黄朝阳 (Zhaoyang Huang)
<zhaoyang.huang@...soc.com>
To: kernel test robot <yujie.liu@...el.com>
CC: "lkp@...ts.01.org" <lkp@...ts.01.org>,
"lkp@...el.com" <lkp@...el.com>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Catalin Marinas <catalin.marinas@....com>,
Matthew Wilcox <willy@...radead.org>,
Zhaoyang Huang <huangzhaoyang@...il.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
王科 (Ke Wang) <Ke.Wang@...soc.com>,
康纪滨 (Steve Kang) <Steve.Kang@...soc.com>
Subject: 答复: [mm] a65edf711f: BUG:kernel_NULL_pointer_dereference
I think it is should caused by an invalid stack_table as it is too early to run stack_depot_early_init. I have filed a new patch to fix.
________________________________________
发件人: kernel test robot <yujie.liu@...el.com>
发送时间: 2022年9月30日 14:22
收件人: 黄朝阳 (Zhaoyang Huang)
抄送: lkp@...ts.01.org; lkp@...el.com; linux-mm@...ck.org; Andrew Morton; Catalin Marinas; Matthew Wilcox; Zhaoyang Huang; linux-kernel@...r.kernel.org; 王科 (Ke Wang); 康纪滨 (Steve Kang)
主题: [mm] a65edf711f: BUG:kernel_NULL_pointer_dereference
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Greeting,
FYI, we noticed the following commit (built with gcc-11):
commit: a65edf711f97a0a3764fc04b0301ab2e073992db ("[PATCH] mm: use stack_depot for recording kmemleak's backtrace")
url: https://github.com/intel-lab-lkp/linux/commits/zhaoyang-huang/mm-use-stack_depot-for-recording-kmemleak-s-backtrace/20220929-183243
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/linux-mm/1664447407-8821-1-git-send-email-zhaoyang.huang@unisoc.com
in testcase: boot
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
[ 0.191645][ T0] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 0.192360][ T0] #PF: supervisor read access in kernel mode
[ 0.192862][ T0] #PF: error_code(0x0000) - not-present page
[ 0.193371][ T0] PGD 0 P4D 0
[ 0.193672][ T0] Oops: 0000 [#1] SMP PTI
[ 0.194051][ T0] CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc3-00706-ga65edf711f97 #26
[ 0.194755][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-4 04/01/2014
[ 0.195583][ T0] RIP: 0010:__stack_depot_save (kbuild/src/x86_64-2/lib/stackdepot.c:452)
[ 0.196081][ T0] Code: 03 48 c7 c7 ec 17 b3 84 e8 f1 ea 85 ff 44 89 e0 23 05 d4 aa 01 03 48 8d 04 c3 48 89 c3 48 89 c7 48 89 44 24 28 e8 34 fc 85 ff <4c> 8b 33 4d 85 f6 0f 84 b6 00 00 00 8b 04 24 83 e8 01 48 8d 04 c5
All code
========
0: 03 48 c7 add -0x39(%rax),%ecx
3: c7 (bad)
4: ec in (%dx),%al
5: 17 (bad)
6: b3 84 mov $0x84,%bl
8: e8 f1 ea 85 ff callq 0xffffffffff85eafe
d: 44 89 e0 mov %r12d,%eax
10: 23 05 d4 aa 01 03 and 0x301aad4(%rip),%eax # 0x301aaea
16: 48 8d 04 c3 lea (%rbx,%rax,8),%rax
1a: 48 89 c3 mov %rax,%rbx
1d: 48 89 c7 mov %rax,%rdi
20: 48 89 44 24 28 mov %rax,0x28(%rsp)
25: e8 34 fc 85 ff callq 0xffffffffff85fc5e
2a:* 4c 8b 33 mov (%rbx),%r14 <-- trapping instruction
2d: 4d 85 f6 test %r14,%r14
30: 0f 84 b6 00 00 00 je 0xec
36: 8b 04 24 mov (%rsp),%eax
39: 83 e8 01 sub $0x1,%eax
3c: 48 rex.W
3d: 8d .byte 0x8d
3e: 04 c5 add $0xc5,%al
Code starting with the faulting instruction
===========================================
0: 4c 8b 33 mov (%rbx),%r14
3: 4d 85 f6 test %r14,%r14
6: 0f 84 b6 00 00 00 je 0xc2
c: 8b 04 24 mov (%rsp),%eax
f: 83 e8 01 sub $0x1,%eax
12: 48 rex.W
13: 8d .byte 0x8d
14: 04 c5 add $0xc5,%al
[ 0.197693][ T0] RSP: 0000:ffffffff83603ca8 EFLAGS: 00010046
[ 0.198214][ T0] RAX: ffffffff83613cd8 RBX: 0000000000000000 RCX: ffffffff81b16d2c
[ 0.198858][ T0] RDX: 0000000000000b1e RSI: 0000000000000000 RDI: 0000000000000000
[ 0.199499][ T0] RBP: 00000000c5a6b597 R08: ffffffff8479d118 R09: 0000000000000000
[ 0.200142][ T0] R10: 0000000000000004 R11: 0001ffffffffffff R12: 0000000027b2cd0a
[ 0.200787][ T0] R13: 0000000000000003 R14: 000000004954f68c R15: ffffffff83603d54
[ 0.201488][ T0] FS: 0000000000000000(0000) GS:ffffffff842c9000(0000) knlGS:0000000000000000
[ 0.202247][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.202807][ T0] CR2: 0000000000000000 CR3: 000000000360a000 CR4: 00000000000406b0
[ 0.203470][ T0] Call Trace:
[ 0.203748][ T0] <TASK>
[ 0.203996][ T0] stack_depot_save (kbuild/src/x86_64-2/lib/stackdepot.c:534)
[ 0.204406][ T0] set_track_prepare (kbuild/src/x86_64-2/mm/slub.c:752)
[ 0.204816][ T0] ? memblock_alloc_range_nid (kbuild/src/x86_64-2/mm/memblock.c:1424)
[ 0.205311][ T0] ? memblock_alloc_internal (kbuild/src/x86_64-2/mm/memblock.c:1514)
[ 0.205781][ T0] ? memblock_alloc_try_nid (kbuild/src/x86_64-2/mm/memblock.c:1614 (discriminator 3))
[ 0.206238][ T0] ? setup_command_line (kbuild/src/x86_64-2/init/main.c:631)
[ 0.206670][ T0] ? start_kernel (kbuild/src/x86_64-2/init/main.c:965)
[ 0.207068][ T0] ? secondary_startup_64_no_verify (kbuild/src/x86_64-2/arch/x86/kernel/head_64.S:358)
[ 0.207612][ T0] ? __raw_callee_save___native_queued_spin_unlock (??:?)
[ 0.208251][ T0] ? write_comp_data (kbuild/src/x86_64-2/kernel/kcov.c:236)
[ 0.208678][ T0] ? strncpy (kbuild/src/x86_64-2/lib/string.c:115)
[ 0.209040][ T0] __create_object (kbuild/src/x86_64-2/mm/kmemleak.c:681)
[ 0.209447][ T0] kmemleak_alloc_phys (kbuild/src/x86_64-2/mm/kmemleak.c:1212)
[ 0.209867][ T0] memblock_alloc_range_nid (kbuild/src/x86_64-2/mm/memblock.c:1424)
[ 0.210344][ T0] memblock_alloc_internal (kbuild/src/x86_64-2/mm/memblock.c:1514)
[ 0.210806][ T0] memblock_alloc_try_nid (kbuild/src/x86_64-2/mm/memblock.c:1614 (discriminator 3))
[ 0.211255][ T0] setup_command_line (kbuild/src/x86_64-2/init/main.c:631)
[ 0.211678][ T0] start_kernel (kbuild/src/x86_64-2/init/main.c:965)
[ 0.212063][ T0] ? load_ucode_bsp (kbuild/src/x86_64-2/arch/x86/kernel/cpu/microcode/core.c:176)
[ 0.212483][ T0] secondary_startup_64_no_verify (kbuild/src/x86_64-2/arch/x86/kernel/head_64.S:358)
[ 0.212996][ T0] </TASK>
[ 0.213247][ T0] Modules linked in:
[ 0.213591][ T0] CR2: 0000000000000000
[ 0.213955][ T0] ---[ end trace 0000000000000000 ]---
[ 0.214415][ T0] RIP: 0010:__stack_depot_save (kbuild/src/x86_64-2/lib/stackdepot.c:452)
[ 0.214933][ T0] Code: 03 48 c7 c7 ec 17 b3 84 e8 f1 ea 85 ff 44 89 e0 23 05 d4 aa 01 03 48 8d 04 c3 48 89 c3 48 89 c7 48 89 44 24 28 e8 34 fc 85 ff <4c> 8b 33 4d 85 f6 0f 84 b6 00 00 00 8b 04 24 83 e8 01 48 8d 04 c5
All code
========
0: 03 48 c7 add -0x39(%rax),%ecx
3: c7 (bad)
4: ec in (%dx),%al
5: 17 (bad)
6: b3 84 mov $0x84,%bl
8: e8 f1 ea 85 ff callq 0xffffffffff85eafe
d: 44 89 e0 mov %r12d,%eax
10: 23 05 d4 aa 01 03 and 0x301aad4(%rip),%eax # 0x301aaea
16: 48 8d 04 c3 lea (%rbx,%rax,8),%rax
1a: 48 89 c3 mov %rax,%rbx
1d: 48 89 c7 mov %rax,%rdi
20: 48 89 44 24 28 mov %rax,0x28(%rsp)
25: e8 34 fc 85 ff callq 0xffffffffff85fc5e
2a:* 4c 8b 33 mov (%rbx),%r14 <-- trapping instruction
2d: 4d 85 f6 test %r14,%r14
30: 0f 84 b6 00 00 00 je 0xec
36: 8b 04 24 mov (%rsp),%eax
39: 83 e8 01 sub $0x1,%eax
3c: 48 rex.W
3d: 8d .byte 0x8d
3e: 04 c5 add $0xc5,%al
Code starting with the faulting instruction
===========================================
0: 4c 8b 33 mov (%rbx),%r14
3: 4d 85 f6 test %r14,%r14
6: 0f 84 b6 00 00 00 je 0xc2
c: 8b 04 24 mov (%rsp),%eax
f: 83 e8 01 sub $0x1,%eax
12: 48 rex.W
13: 8d .byte 0x8d
14: 04 c5 add $0xc5,%al
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Link: https://lore.kernel.org/r/202209301329.8c1446ee-yujie.liu@intel.com
To reproduce:
# build kernel
cd linux
cp config-6.0.0-rc3-00706-ga65edf711f97 .config
make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-11 CC=gcc-11 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://01.org/lkp
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