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@intel.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