Hello,
kernel test robot noticed "BUG:kernel_NULL_pointer_dereference,address" on:
commit: 6f4c005a5f8b8ff1ce674731545b302af5f28f3f ("[RFC PATCH 2/4] calculate memory.low for the local node and track its usage")
url: https://github.com/intel-lab-lkp/linux/commits/kaiyang2-cs-cmu-edu/Add-get_cgroup_local_usage-for-estimating-the-top-tier-memory-usage/20240921-061404
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/all/20240920221202.1734227-3-kaiyang2@xxxxxxxxxx/
patch subject: [RFC PATCH 2/4] calculate memory.low for the local node and track its usage
in testcase: boot
compiler: gcc-12
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+---------------------------------------------+------------+------------+
| | 0af685cc17 | 6f4c005a5f |
+---------------------------------------------+------------+------------+
| boot_successes | 12 | 0 |
| boot_failures | 0 | 12 |
| BUG:kernel_NULL_pointer_dereference,address | 0 | 12 |
| Oops | 0 | 12 |
| RIP:si_meminfo_node | 0 | 12 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 12 |
+---------------------------------------------+------------+------------+
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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202409221625.1e974ac-oliver.sang@xxxxxxxxx
[ 14.204830][ T1] BUG: kernel NULL pointer dereference, address: 0000000000000090
[ 14.206729][ T1] #PF: supervisor read access in kernel mode
[ 14.208090][ T1] #PF: error_code(0x0000) - not-present page
[ 14.209393][ T1] PGD 0 P4D 0
[ 14.210212][ T1] Oops: Oops: 0000 [#1] SMP PTI
[ 14.211269][ T1] CPU: 1 UID: 0 PID: 1 Comm: systemd Not tainted 6.11.0-rc6-00570-g6f4c005a5f8b #1
[ 14.213284][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 14.215290][ T1] RIP: 0010:si_meminfo_node (arch/x86/include/asm/atomic64_64.h:15 (discriminator 3) include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 3) include/linux/atomic/atomic-long.h:38 (discriminator 3) include/linux/atomic/atomic-instrumented.h:3189 (discriminator 3) include/linux/mmzone.h:1042 (discriminator 3) mm/show_mem.c:98 (discriminator 3))
[ 14.216523][ T1] Code: 90 90 66 0f 1f 00 0f 1f 44 00 00 48 63 c6 55 31 d2 4c 8b 04 c5 c0 a7 fb 8c 53 48 89 c5 48 89 fb 4c 89 c0 49 8d b8 00 1e 00 00 <48> 8b 88 90 00 00 00 48 05 00 06 00 00 48 01 ca 48 39 f8 75 eb 48
All code
========
0: 90 nop
1: 90 nop
2: 66 0f 1f 00 nopw (%rax)
6: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
b: 48 63 c6 movslq %esi,%rax
e: 55 push %rbp
f: 31 d2 xor %edx,%edx
11: 4c 8b 04 c5 c0 a7 fb mov -0x73045840(,%rax,8),%r8
18: 8c
19: 53 push %rbx
1a: 48 89 c5 mov %rax,%rbp
1d: 48 89 fb mov %rdi,%rbx
20: 4c 89 c0 mov %r8,%rax
23: 49 8d b8 00 1e 00 00 lea 0x1e00(%r8),%rdi
2a:* 48 8b 88 90 00 00 00 mov 0x90(%rax),%rcx <-- trapping instruction
31: 48 05 00 06 00 00 add $0x600,%rax
37: 48 01 ca add %rcx,%rdx
3a: 48 39 f8 cmp %rdi,%rax
3d: 75 eb jne 0x2a
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 8b 88 90 00 00 00 mov 0x90(%rax),%rcx
7: 48 05 00 06 00 00 add $0x600,%rax
d: 48 01 ca add %rcx,%rdx
10: 48 39 f8 cmp %rdi,%rax
13: 75 eb jne 0x0
15: 48 rex.W
[ 14.220364][ T1] RSP: 0018:ffffb14b40013d68 EFLAGS: 00010246
[ 14.221717][ T1] RAX: 0000000000000000 RBX: ffffb14b40013d88 RCX: 00000000003a19a2
[ 14.223496][ T1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000001e00
[ 14.225170][ T1] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000008
[ 14.226964][ T1] R10: 0000000000000008 R11: 0fffffffffffffff R12: ffffb14b40013d88
[ 14.228774][ T1] R13: 00000000003e7ac3 R14: ffffb14b40013e88 R15: ffff98ab0434f7a0
[ 14.230421][ T1] FS: 00007f9569ae9940(0000) GS:ffff98adefd00000(0000) knlGS:0000000000000000
[ 14.234569][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.235900][ T1] CR2: 0000000000000090 CR3: 0000000100072000 CR4: 00000000000006f0
[ 14.237620][ T1] Call Trace:
[ 14.238502][ T1] <TASK>
[ 14.239254][ T1] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434)
[ 14.240189][ T1] ? page_fault_oops (arch/x86/mm/fault.c:715)
[ 14.241254][ T1] ? exc_page_fault (arch/x86/include/asm/irqflags.h:37 arch/x86/include/asm/irqflags.h:92 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539)
[ 14.242297][ T1] ? asm_exc_page_fault (arch/x86/include/asm/idtentry.h:623)
[ 14.243313][ T1] ? si_meminfo_node (arch/x86/include/asm/atomic64_64.h:15 (discriminator 3) include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 3) include/linux/atomic/atomic-long.h:38 (discriminator 3) include/linux/atomic/atomic-instrumented.h:3189 (discriminator 3) include/linux/mmzone.h:1042 (discriminator 3) mm/show_mem.c:98 (discriminator 3))
[ 14.244443][ T1] ? si_meminfo_node (mm/show_mem.c:114)
[ 14.245460][ T1] memory_low_write (mm/memcontrol.c:4088)
[ 14.246547][ T1] kernfs_fop_write_iter (fs/kernfs/file.c:338)
[ 14.247804][ T1] vfs_write (fs/read_write.c:497 fs/read_write.c:590)
[ 14.248830][ T1] ksys_write (fs/read_write.c:643)
[ 14.249783][ T1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 14.250800][ T1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 14.252260][ T1] RIP: 0033:0x7f956a64b240
[ 14.253276][ T1] Code: 40 00 48 8b 15 c1 9b 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d a1 23 0e 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
All code
========
0: 40 00 48 8b add %cl,-0x75(%rax)
4: 15 c1 9b 0d 00 adc $0xd9bc1,%eax
9: f7 d8 neg %eax
b: 64 89 02 mov %eax,%fs:(%rdx)
e: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax
15: eb b7 jmp 0xffffffffffffffce
17: 0f 1f 00 nopl (%rax)
1a: 80 3d a1 23 0e 00 00 cmpb $0x0,0xe23a1(%rip) # 0xe23c2
21: 74 17 je 0x3a
23: b8 01 00 00 00 mov $0x1,%eax
28: 0f 05 syscall
2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction
30: 77 58 ja 0x8a
32: c3 retq
33: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
3a: 48 83 ec 28 sub $0x28,%rsp
3e: 48 rex.W
3f: 89 .byte 0x89
Code starting with the faulting instruction
===========================================
0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
6: 77 58 ja 0x60
8: c3 retq
9: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
10: 48 83 ec 28 sub $0x28,%rsp
14: 48 rex.W
15: 89 .byte 0x89
[ 14.257195][ T1] RSP: 002b:00007ffcc66594e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[ 14.259009][ T1] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f956a64b240
[ 14.260848][ T1] RDX: 0000000000000002 RSI: 00007ffcc6659740 RDI: 000000000000001b
[ 14.262500][ T1] RBP: 00007ffcc6659740 R08: 0000000000000000 R09: 0000000000000001
[ 14.264147][ T1] R10: 00007f956a6c4820 R11: 0000000000000202 R12: 0000000000000002
[ 14.265934][ T1] R13: 000055fd63872c10 R14: 0000000000000002 R15: 00007f956a7219e0
[ 14.267589][ T1] </TASK>
[ 14.268340][ T1] Modules linked in: ip_tables
[ 14.269410][ T1] CR2: 0000000000000090
[ 14.270478][ T1] ---[ end trace 0000000000000000 ]---
[ 14.271717][ T1] RIP: 0010:si_meminfo_node (arch/x86/include/asm/atomic64_64.h:15 (discriminator 3) include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 3) include/linux/atomic/atomic-long.h:38 (discriminator 3) include/linux/atomic/atomic-instrumented.h:3189 (discriminator 3) include/linux/mmzone.h:1042 (discriminator 3) mm/show_mem.c:98 (discriminator 3))
[ 14.272874][ T1] Code: 90 90 66 0f 1f 00 0f 1f 44 00 00 48 63 c6 55 31 d2 4c 8b 04 c5 c0 a7 fb 8c 53 48 89 c5 48 89 fb 4c 89 c0 49 8d b8 00 1e 00 00 <48> 8b 88 90 00 00 00 48 05 00 06 00 00 48 01 ca 48 39 f8 75 eb 48
All code
========
0: 90 nop
1: 90 nop
2: 66 0f 1f 00 nopw (%rax)
6: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
b: 48 63 c6 movslq %esi,%rax
e: 55 push %rbp
f: 31 d2 xor %edx,%edx
11: 4c 8b 04 c5 c0 a7 fb mov -0x73045840(,%rax,8),%r8
18: 8c
19: 53 push %rbx
1a: 48 89 c5 mov %rax,%rbp
1d: 48 89 fb mov %rdi,%rbx
20: 4c 89 c0 mov %r8,%rax
23: 49 8d b8 00 1e 00 00 lea 0x1e00(%r8),%rdi
2a:* 48 8b 88 90 00 00 00 mov 0x90(%rax),%rcx <-- trapping instruction
31: 48 05 00 06 00 00 add $0x600,%rax
37: 48 01 ca add %rcx,%rdx
3a: 48 39 f8 cmp %rdi,%rax
3d: 75 eb jne 0x2a
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 8b 88 90 00 00 00 mov 0x90(%rax),%rcx
7: 48 05 00 06 00 00 add $0x600,%rax
d: 48 01 ca add %rcx,%rdx
10: 48 39 f8 cmp %rdi,%rax
13: 75 eb jne 0x0
15: 48 rex.W
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240922/202409221625.1e974ac-oliver.sang@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
