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Date: Wed, 7 Feb 2024 14:42:43 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Zhen Lei <thunder.leizhen@...wei.com>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>, <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, <oliver.sang@...el.com>
Subject: [linus:master] [kobject]  1b28cb81da: canonical_address#:#[##]



Hello,

kernel test robot noticed "canonical_address#:#[##]" on:

commit: 1b28cb81dab7c1eedc6034206f4e8d644046ad31 ("kobject: Remove redundant checks for whether ktype is NULL")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master 54be6c6c5ae8e0d93a6c4641cb7528eb0b6ba478 (v6.8-rc3)]
[test failed on linux-next/master 076d56d74f17e625b3d63cf4743b3d7d02180379]

in testcase: boot

compiler: gcc-11
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

(please refer to attached dmesg/kmsg for entire log/backtrace)



we noticed this issue is very random, as below, observed 4 times out of 68 runs.
but we didn't see in on parent.

meanwhile, we noticed there is another random issue on parent, the dmesg is
attached as dmesg-4d0fe8c52b.xz. we didn't see this issue on 1b28cb81da. FYI
(the dmesg for 1b28cb81da is uploaded to [1])

4d0fe8c52bb3029d 1b28cb81dab7c1eedc6034206f4
---------------- ---------------------------
       fail:runs  %reproduction    fail:runs
           |             |             |
           :68           6%           4:68    dmesg.Kernel_panic-not_syncing:Fatal_exception
           :68           6%           4:68    dmesg.RIP:__kobject_del
          5:68          -7%            :68    dmesg.RIP:kobject_put
          5:68          -7%            :68    dmesg.RIP:refcount_warn_saturate
          5:68          -7%            :68    dmesg.WARNING:at_lib/kobject.c:#kobject_put
          5:68          -7%            :68    dmesg.WARNING:at_lib/refcount.c:#refcount_warn_saturate
           :68           6%           4:68    dmesg.canonical_address#:#[##]



If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202402071403.e302e33a-oliver.sang@intel.com



[   75.238491][    T1] IRQ13 -> 0:13
[   75.238931][    T1] IRQ14 -> 0:14
[   75.239377][    T1] IRQ15 -> 0:15
[   75.239833][    T1] .................................... done.
[   75.342389][    T1] sched_clock: Marking stable (75300013917, 40623244)->(75406217264, -65580103)
[   84.458843][    T6] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
[   84.459548][    T1] kmemleak: Kernel memory leak detector initialized (mem pool available: 13821)
[   84.460356][    T6] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
[   84.460364][    T6] CPU: 0 PID: 6 Comm: kworker/0:0 Tainted: G                 N 6.5.0-rc4-00030-g1b28cb81dab7 #1
[   84.463835][    T6] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[   84.464399][   T61] kmemleak: Automatic memory scanning thread started
[   84.465113][    T6] Workqueue: events slab_caches_to_rcu_destroy_workfn
[ 84.465127][ T6] RIP: 0010:__kobject_del (kbuild/src/consumer/lib/kobject.c:592) 
[ 84.465137][ T6] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 23 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 28 48 8d 7d 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f6 01 00 00 48 8b 75 10 48 89 df 48 8d 6b 3c e8
All code
========
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 23 02 00 00    	jne    0x234
  11:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  18:	fc ff df 
  1b:	48 8b 6b 28          	mov    0x28(%rbx),%rbp
  1f:	48 8d 7d 10          	lea    0x10(%rbp),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
  2a:*	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)		<-- trapping instruction
  2e:	0f 85 f6 01 00 00    	jne    0x22a
  34:	48 8b 75 10          	mov    0x10(%rbp),%rsi
  38:	48 89 df             	mov    %rbx,%rdi
  3b:	48 8d 6b 3c          	lea    0x3c(%rbx),%rbp
  3f:	e8                   	.byte 0xe8

Code starting with the faulting instruction
===========================================
   0:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   4:	0f 85 f6 01 00 00    	jne    0x200
   a:	48 8b 75 10          	mov    0x10(%rbp),%rsi
   e:	48 89 df             	mov    %rbx,%rdi
  11:	48 8d 6b 3c          	lea    0x3c(%rbx),%rbp
  15:	e8                   	.byte 0xe8
[   84.469942][    T6] RSP: 0000:ffffc9000006fcb0 EFLAGS: 00010202
[   84.470698][    T6] RAX: dffffc0000000000 RBX: ffff888129354838 RCX: 0000000000000000
[   84.471694][    T6] RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000010
[   84.472675][    T6] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   84.473661][    T6] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[   84.474651][    T6] R13: ffffc9000006fdb8 R14: ffff8881002c2ea8 R15: ffffffff83ac74c0
[   84.475621][    T6] FS:  0000000000000000(0000) GS:ffff8883aee00000(0000) knlGS:0000000000000000
[   84.476712][    T6] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   84.477516][    T6] CR2: ffff88843ffff000 CR3: 0000000003435000 CR4: 00000000000406b0
[   84.478471][    T6] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   84.479449][    T6] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   84.480436][    T6] Call Trace:
[   84.480849][    T6]  <TASK>
[ 84.481216][ T6] ? die_addr (kbuild/src/consumer/arch/x86/kernel/dumpstack.c:421 kbuild/src/consumer/arch/x86/kernel/dumpstack.c:460) 
[ 84.481738][ T6] ? exc_general_protection (kbuild/src/consumer/arch/x86/kernel/traps.c:787 kbuild/src/consumer/arch/x86/kernel/traps.c:729) 
[ 84.482409][ T6] ? asm_exc_general_protection (kbuild/src/consumer/arch/x86/include/asm/idtentry.h:564) 
[ 84.483127][ T6] ? __kobject_del (kbuild/src/consumer/lib/kobject.c:592) 


[1]
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240207/202402071403.e302e33a-oliver.sang@intel.com



-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki


Download attachment "dmesg-4d0fe8c52b.xz" of type "application/x-xz" (14260 bytes)

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