Hello,
kernel test robot noticed "WARNING:at_mm/debug_vm_pgtable.c:#debug_vm_pgtable" on:
commit: 96a654e145f9f3aea672dc22c5bf0a3ef26befac ("x86/mtrr: Use new cache_map in mtrr_type_lookup()")
https://git.kernel.org/cgit/linux/kernel/git/bp/bp.git rc1-mtrr
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)
+----------------------------------------------------+------------+------------+
| | bbd7b00e1e | 96a654e145 |
+----------------------------------------------------+------------+------------+
| WARNING:at_mm/debug_vm_pgtable.c:#debug_vm_pgtable | 0 | 20 |
+----------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <[email protected]>
| Link: https://lore.kernel.org/oe-lkp/[email protected]
[ 9.026438][ T1] calling debug_vm_pgtable+0x0/0x6b9 @ 1
[ 9.027414][ T1] debug_vm_pgtable: [debug_vm_pgtable ]: Validating architecture page table helpers
[ 9.043005][ T1] pmd_set_huge: Cannot satisfy [mem 0x40000000-0x40200000] with a huge-page mapping due to MTRR override.
[ 9.044939][ T1] ------------[ cut here ]------------
[ 9.045873][ T1] WARNING: CPU: 0 PID: 1 at mm/debug_vm_pgtable.c:445 debug_vm_pgtable (mm/debug_vm_pgtable.c:445 mm/debug_vm_pgtable.c:1385)
[ 9.047475][ T1] Modules linked in:
[ 9.048206][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.4.0-rc1-00013-g96a654e145f9 #1
[ 9.049640][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 9.051385][ T1] RIP: 0010:debug_vm_pgtable (mm/debug_vm_pgtable.c:445 mm/debug_vm_pgtable.c:1385)
[ 9.052398][ T1] Code: 8b 44 24 28 48 c7 00 00 00 00 00 48 8b b4 24 b0 00 00 00 48 8b 54 24 60 48 8b 7c 24 28 48 c1 e6 0c e8 8d 17 2d fe 85 c0 75 02 <0f> 0b 48 8b 7c 24 28 e8 84 18 2d fe 85 c0 75 02 0f 0b 48 8b 44 24
All code
========
0: 8b 44 24 28 mov 0x28(%rsp),%eax
4: 48 c7 00 00 00 00 00 movq $0x0,(%rax)
b: 48 8b b4 24 b0 00 00 mov 0xb0(%rsp),%rsi
12: 00
13: 48 8b 54 24 60 mov 0x60(%rsp),%rdx
18: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi
1d: 48 c1 e6 0c shl $0xc,%rsi
21: e8 8d 17 2d fe call 0xfffffffffe2d17b3
26: 85 c0 test %eax,%eax
28: 75 02 jne 0x2c
2a:* 0f 0b ud2 <-- trapping instruction
2c: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi
31: e8 84 18 2d fe call 0xfffffffffe2d18ba
36: 85 c0 test %eax,%eax
38: 75 02 jne 0x3c
3a: 0f 0b ud2
3c: 48 rex.W
3d: 8b .byte 0x8b
3e: 44 rex.R
3f: 24 .byte 0x24
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi
7: e8 84 18 2d fe call 0xfffffffffe2d1890
c: 85 c0 test %eax,%eax
e: 75 02 jne 0x12
10: 0f 0b ud2
12: 48 rex.W
13: 8b .byte 0x8b
14: 44 rex.R
15: 24 .byte 0x24
[ 9.055537][ T1] RSP: 0000:ffffc90000013db8 EFLAGS: 00010246
[ 9.056536][ T1] RAX: 0000000000000000 RBX: 0000000136a99000 RCX: 0000000000000003
[ 9.057928][ T1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
[ 9.059315][ T1] RBP: ffffea0004daa6a8 R08: 0000000000000000 R09: 0000000000000019
[ 9.060685][ T1] R10: 0000000000000000 R11: 000000005f646d70 R12: 0000000000000000
[ 9.062041][ T1] R13: ffffea0004daa668 R14: 0000000000000000 R15: 0000000000000000
[ 9.063411][ T1] FS: 0000000000000000(0000) GS:ffff88842fc00000(0000) knlGS:0000000000000000
[ 9.064969][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9.066098][ T1] CR2: ffff88843ffff000 CR3: 0000000002432000 CR4: 00000000000406f0
[ 9.067485][ T1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 9.068873][ T1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 9.070246][ T1] Call Trace:
[ 9.070893][ T1] <TASK>
[ 9.071464][ T1] ? init_args (mm/debug_vm_pgtable.c:1305)
[ 9.072256][ T1] do_one_initcall (init/main.c:1246)
[ 9.073087][ T1] do_initcalls (init/main.c:1318 init/main.c:1335)
[ 9.073872][ T1] kernel_init_freeable (init/main.c:1575)
[ 9.074781][ T1] ? rest_init (init/main.c:1454)
[ 9.075536][ T1] kernel_init (init/main.c:1464)
[ 9.076331][ T1] ret_from_fork (arch/x86/entry/entry_64.S:314)
[ 9.077141][ T1] </TASK>
[ 9.077713][ T1] ---[ end trace 0000000000000000 ]---
To reproduce:
# build kernel
cd linux
cp config-6.4.0-rc1-00013-g96a654e145f9 .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://github.com/intel/lkp-tests