[linux-next:master] [memblock] c7fc9cde41: RIP:__free_reserved_area

[linux-next:master] [memblock] c7fc9cde41: RIP:__free_reserved_area

[kernel test robot]

Hello,

kernel test robot noticed "RIP:__free_reserved_area" on:

commit: c7fc9cde41be029cf6675befbafcbb2dab40b39b ("memblock: warn when freeing reserved memory before memory map is initialized")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

[test failed on linux-next/master 3b058d1aeeeff27a7289529c4944291613b364e9]

in testcase: ltp
version: 
with following parameters:

	disk: 1HDD
	fs: btrfs
	test: dio-01



config: x86_64-rhel-9.4-ltp
compiler: gcc-14
test machine: 4 threads 1 sockets Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz (Ivy Bridge) with 8G memory

(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/202603302154.b50adaf1-lkp@intel.com



kern  :warn  : [    0.609106] [      T0] ------------[ cut here ]------------
kern  :warn  : [    0.609305] [      T0] Cannot free reserved memory because of deferred initialization of the memory map
kern  :warn  : [    0.609310] [      T0] WARNING: mm/memblock.c:904 at __free_reserved_area+0x3e2/0x530, CPU#0: swapper/0/0
kern  :warn  : [    0.609778] [      T0] Modules linked in:
kern  :warn  : [    0.609933] [      T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G S                  7.0.0-rc4-00012-gc7fc9cde41be #1 PREEMPT(lazy)
kern  :warn  : [    0.610264] [      T0] Tainted: [S]=CPU_OUT_OF_SPEC
kern  :warn  : [    0.610428] [      T0] Hardware name: Hewlett-Packard p6-1451cx/2ADA, BIOS 8.15 02/05/2013
kern  :warn  : [    0.610686] [      T0] RIP: 0010:__free_reserved_area (mm/memblock.c:904 (discriminator 1))
kern  :warn  : [    0.610883] [      T0] Code: 48 c1 e0 09 49 81 e0 00 80 ff ff 4d 8d 2c 00 65 ff 0d 52 f1 51 05 74 29 49 39 dd 0f 82 e2 fd ff ff eb 83 48 8d 3d 8e 2b 53 04 <67> 48 0f b9 3a 45 31 e4 e9 6f ff ff ff e8 4c 71 4d ff e9 88 fd ff
All code
========
   0:	48 c1 e0 09          	shl    $0x9,%rax
   4:	49 81 e0 00 80 ff ff 	and    $0xffffffffffff8000,%r8
   b:	4d 8d 2c 00          	lea    (%r8,%rax,1),%r13
   f:	65 ff 0d 52 f1 51 05 	decl   %gs:0x551f152(%rip)        # 0x551f168
  16:	74 29                	je     0x41
  18:	49 39 dd             	cmp    %rbx,%r13
  1b:	0f 82 e2 fd ff ff    	jb     0xfffffffffffffe03
  21:	eb 83                	jmp    0xffffffffffffffa6
  23:	48 8d 3d 8e 2b 53 04 	lea    0x4532b8e(%rip),%rdi        # 0x4532bb8
  2a:*	67 48 0f b9 3a       	ud1    (%edx),%rdi		<-- trapping instruction
  2f:	45 31 e4             	xor    %r12d,%r12d
  32:	e9 6f ff ff ff       	jmp    0xffffffffffffffa6
  37:	e8 4c 71 4d ff       	call   0xffffffffff4d7188
  3c:	e9                   	.byte 0xe9
  3d:	88 fd                	mov    %bh,%ch
  3f:	ff                   	.byte 0xff

Code starting with the faulting instruction
===========================================
   0:	67 48 0f b9 3a       	ud1    (%edx),%rdi
   5:	45 31 e4             	xor    %r12d,%r12d
   8:	e9 6f ff ff ff       	jmp    0xffffffffffffff7c
   d:	e8 4c 71 4d ff       	call   0xffffffffff4d715e
  12:	e9                   	.byte 0xe9
  13:	88 fd                	mov    %bh,%ch
  15:	ff                   	.byte 0xff
kern  :warn  : [    0.611363] [      T0] RSP: 0000:ffffffff85207e30 EFLAGS: 00010286
kern  :warn  : [    0.611558] [      T0] RAX: 0000000297600001 RBX: 000000021e9ba000 RCX: 0000000080000001
kern  :warn  : [    0.611775] [      T0] RDX: 00000000000000cc RSI: 000000021e9c6000 RDI: ffffffff863afa80
kern  :warn  : [    0.612016] [      T0] RBP: ffffffff842300c0 R08: ffff88821e9c5fff R09: 0000000000000001
kern  :warn  : [    0.612256] [      T0] R10: ffffffff8742a600 R11: 8000000000000063 R12: dffffc0000000000
kern  :warn  : [    0.612494] [      T0] R13: 0000000000000000 R14: 0000000000000000 R15: 000000021fdf1000
kern  :warn  : [    0.612774] [      T0] FS:  0000000000000000(0000) GS:ffff888214e8c000(0000) knlGS:0000000000000000
kern  :warn  : [    0.613034] [      T0] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kern  :warn  : [    0.613231] [      T0] CR2: ffff88821f001000 CR3: 000000021c872001 CR4: 00000000001706f0
kern  :warn  : [    0.613471] [      T0] Call Trace:
kern  :warn  : [    0.613609] [      T0]  <TASK>
kern  :warn  : [    0.613811] [      T0]  ? __pfx_set_memory_rw (arch/x86/mm/pat/set_memory.c:2319)
kern  :warn  : [    0.613991] [      T0]  free_reserved_area (mm/memblock.c:958)
kern  :warn  : [    0.614165] [      T0]  alternative_instructions (arch/x86/kernel/alternative.c:2459)
kern  :warn  : [    0.614355] [      T0]  arch_cpu_finalize_init (arch/x86/include/asm/page_64.h:142 arch/x86/kernel/cpu/common.c:2616)
kern  :warn  : [    0.614538] [      T0]  start_kernel (init/main.c:1180)
kern  :warn  : [    0.614687] [      T0]  x86_64_start_reservations (arch/x86/kernel/head64.c:310)
kern  :warn  : [    0.614872] [      T0]  x86_64_start_kernel (??:?)
kern  :warn  : [    0.615048] [      T0]  common_startup_64 (arch/x86/kernel/head_64.S:419)
kern  :warn  : [    0.615225] [      T0]  </TASK>
kern  :warn  : [    0.615355] [      T0] ---[ end trace 0000000000000000 ]---


The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260330/202603302154.b50adaf1-lkp@intel.com



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