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* [linus:master] [mm]  cc92eba1c8: WARNING:at_kernel/rcu/tree_plugin.h:#__rcu_read_unlock
@ 2024-05-27  2:56 kernel test robot
  2024-06-01 23:42 ` Suren Baghdasaryan
  0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2024-05-27  2:56 UTC (permalink / raw)
  To: Suren Baghdasaryan
  Cc: oe-lkp, lkp, linux-kernel, Andrew Morton, Vlastimil Babka,
	Kees Cook, Alexander Viro, Alex Gaynor, Alice Ryhl,
	Andreas Hindborg, Benno Lossin, Björn Roy Baron, Boqun Feng,
	Christoph Lameter, Dennis Zhou, Gary Guo, Kent Overstreet,
	Miguel Ojeda, Pasha Tatashin, Peter Zijlstra, Tejun Heo,
	Wedson Almeida Filho, linux-mm, oliver.sang



Hello,

kernel test robot noticed "WARNING:at_kernel/rcu/tree_plugin.h:#__rcu_read_unlock" on:

commit: cc92eba1c88b1f74e0f044df2738f4e4b22f1e4e ("mm: fix non-compound multi-order memory accounting in __free_pages")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master      6d69b6c12fce479fde7bc06f686212451688a102]
[test failed on linux-next/master 3689b0ef08b70e4e03b82ebd37730a03a672853a]

in testcase: boot

compiler: clang-18
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

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



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@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202405271029.6d2f9c4c-lkp@intel.com


[    2.504179][    C0] ------------[ cut here ]------------
[ 2.506222][ C0] WARNING: CPU: 0 PID: 1 at kernel/rcu/tree_plugin.h:431 __rcu_read_unlock (kernel/rcu/tree_plugin.h:431) 
[    2.508117][    C0] Modules linked in:
[    2.509538][    C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc4-00080-gcc92eba1c88b #1 1899fb0438e1349d8761ad4016a94aaeaa8a37df
[    2.512111][    C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 2.518194][ C0] RIP: 0010:__rcu_read_unlock (kernel/rcu/tree_plugin.h:431) 
[ 2.520109][ C0] Code: 00 00 41 83 3e 00 75 26 43 0f b6 04 3c 84 c0 75 5f 8b 03 3d 00 00 00 40 73 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc <0f> 0b eb ec e8 8d 00 00 00 eb d3 89 d9 80 e1 07 80 c1 03 38 c1 7c
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	41 83 3e 00          	cmpl   $0x0,(%r14)
   6:	75 26                	jne    0x2e
   8:	43 0f b6 04 3c       	movzbl (%r12,%r15,1),%eax
   d:	84 c0                	test   %al,%al
   f:	75 5f                	jne    0x70
  11:	8b 03                	mov    (%rbx),%eax
  13:	3d 00 00 00 40       	cmp    $0x40000000,%eax
  18:	73 10                	jae    0x2a
  1a:	5b                   	pop    %rbx
  1b:	41 5c                	pop    %r12
  1d:	41 5d                	pop    %r13
  1f:	41 5e                	pop    %r14
  21:	41 5f                	pop    %r15
  23:	5d                   	pop    %rbp
  24:	c3                   	ret
  25:	cc                   	int3
  26:	cc                   	int3
  27:	cc                   	int3
  28:	cc                   	int3
  29:	cc                   	int3
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	eb ec                	jmp    0x1a
  2e:	e8 8d 00 00 00       	call   0xc0
  33:	eb d3                	jmp    0x8
  35:	89 d9                	mov    %ebx,%ecx
  37:	80 e1 07             	and    $0x7,%cl
  3a:	80 c1 03             	add    $0x3,%cl
  3d:	38 c1                	cmp    %al,%cl
  3f:	7c                   	.byte 0x7c

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	eb ec                	jmp    0xfffffffffffffff0
   4:	e8 8d 00 00 00       	call   0x96
   9:	eb d3                	jmp    0xffffffffffffffde
   b:	89 d9                	mov    %ebx,%ecx
   d:	80 e1 07             	and    $0x7,%cl
  10:	80 c1 03             	add    $0x3,%cl
  13:	38 c1                	cmp    %al,%cl
  15:	7c                   	.byte 0x7c
[    2.524112][    C0] RSP: 0000:ffff8883ae809db8 EFLAGS: 00010286
[    2.526188][    C0] RAX: 00000000ffffffff RBX: ffff888100ac04ac RCX: dffffc0000000000
[    2.528109][    C0] RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff888100ac0040
[    2.530810][    C0] RBP: 00000000ffffffff R08: ffffffff878bc007 R09: 1ffffffff0f17800
[    2.532116][    C0] R10: dffffc0000000000 R11: fffffbfff0f17801 R12: 1ffff11020158095
[    2.534888][    C0] R13: dffffc0000000000 R14: ffffea0004037400 R15: dffffc0000000000
[    2.536108][    C0] FS:  0000000000000000(0000) GS:ffff8883ae800000(0000) knlGS:0000000000000000
[    2.539082][    C0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    2.540110][    C0] CR2: ffff88843ffff000 CR3: 00000000056ce000 CR4: 00000000000406f0
[    2.542812][    C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    2.544109][    C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    2.546833][    C0] Call Trace:
[    2.548013][    C0]  <IRQ>
[ 2.548772][ C0] ? __warn (kernel/panic.c:240 kernel/panic.c:694) 
[ 2.550219][ C0] ? __rcu_read_unlock (kernel/rcu/tree_plugin.h:431) 
[ 2.551982][ C0] ? __rcu_read_unlock (kernel/rcu/tree_plugin.h:431) 
[ 2.553266][ C0] ? report_bug (lib/bug.c:?) 
[ 2.555068][ C0] ? handle_bug (arch/x86/kernel/traps.c:239) 
[ 2.556133][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:260) 
[ 2.557753][ C0] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621) 
[ 2.559780][ C0] ? __rcu_read_unlock (kernel/rcu/tree_plugin.h:431) 
[ 2.561383][ C0] page_ext_put (include/linux/rcupdate.h:339 include/linux/rcupdate.h:814 mm/page_ext.c:537) 
[ 2.562887][ C0] __free_pages (include/linux/page_ref.h:210 include/linux/mm.h:1135 mm/page_alloc.c:4669) 
[ 2.564182][ C0] ? __pfx_thread_stack_free_rcu (kernel/fork.c:346) 
[ 2.566080][ C0] ? rcu_core (kernel/rcu/tree.c:?) 
[ 2.567681][ C0] rcu_core (include/linux/rcupdate.h:339 kernel/rcu/tree.c:2198 kernel/rcu/tree.c:2471) 
[ 2.569661][ C0] __do_softirq (arch/x86/include/asm/jump_label.h:27 include/linux/jump_label.h:207 include/trace/events/irq.h:142 kernel/softirq.c:555) 
[ 2.571612][ C0] ? __irq_exit_rcu (kernel/softirq.c:613 kernel/softirq.c:635) 
[ 2.573327][ C0] __irq_exit_rcu (kernel/softirq.c:613 kernel/softirq.c:635) 
[ 2.574888][ C0] irq_exit_rcu (kernel/softirq.c:647) 
[ 2.576112][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043) 
[    2.578091][    C0]  </IRQ>
[    2.579130][    C0]  <TASK>
[ 2.580154][ C0] asm_sysvec_apic_timer_interrupt (arch/x86/include/asm/idtentry.h:702) 
[ 2.582143][ C0] RIP: 0010:clear_page_rep (arch/x86/lib/clear_page_64.S:20) 
[ 2.583920][ C0] Code: 1f 46 c0 fd e9 26 ff ff ff cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 b9 00 02 00 00 31 c0 <f3> 48 ab c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90
All code
========
   0:	1f                   	(bad)
   1:	46 c0 fd e9          	rex.RX sar $0xe9,%bpl
   5:	26 ff                	es (bad)
   7:	ff                   	(bad)
   8:	ff cc                	dec    %esp
   a:	cc                   	int3
   b:	cc                   	int3
   c:	cc                   	int3
   d:	cc                   	int3
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	b9 00 02 00 00       	mov    $0x200,%ecx
  28:	31 c0                	xor    %eax,%eax
  2a:*	f3 48 ab             	rep stos %rax,%es:(%rdi)		<-- trapping instruction
  2d:	c3                   	ret
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	90                   	nop
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	f3 48 ab             	rep stos %rax,%es:(%rdi)
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240527/202405271029.6d2f9c4c-lkp@intel.com



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



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2024-05-27  2:56 [linus:master] [mm] cc92eba1c8: WARNING:at_kernel/rcu/tree_plugin.h:#__rcu_read_unlock kernel test robot
2024-06-01 23:42 ` Suren Baghdasaryan

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