Re: [linux-next:master] [mm] bbcbf2a3f0: kernel_BUG_at_mm/memory.c
From: Aithal, Srikanth
Date: Wed Dec 20 2023 - 21:57:19 EST
On 12/19/2023 9:16 PM, kernel test robot wrote:
Hello,
kernel test robot noticed "kernel_BUG_at_mm/memory.c" on:
commit: bbcbf2a3f05f74f9d268eab57abbdce6a65a94ad ("mm: convert ksm_might_need_to_copy() to work on folios")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
[test failed on linux-next/master aa4db8324c4d0e67aa4670356df4e9fae14b4d37]
in testcase: vm-scalability
version: vm-scalability-x86_64-1.0-0_20220518
with following parameters:
runtime: 300
thp_enabled: always
thp_defrag: always
nr_task: 32
nr_ssd: 1
priority: 1
test: swap-w-rand
cpufreq_governor: performance
test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us.
test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/
compiler: gcc-12
test machine: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz (Ice Lake) with 128G 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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202312192319.fa8f5709-oliver.sang@xxxxxxxxx
[ 61.404380][ T5947] ------------[ cut here ]------------
[ 61.409984][ T5947] kernel BUG at mm/memory.c:3990!
[ 61.415085][ T5947] invalid opcode: 0000 [#1] SMP NOPTI
[ 61.420506][ T5947] CPU: 32 PID: 5947 Comm: usemem Tainted: G S 6.7.0-rc4-00252-gbbcbf2a3f05f #1
[ 61.430881][ T5947] Hardware name: Intel Corporation M50CYP2SB1U/M50CYP2SB1U, BIOS SE5C620.86B.01.01.0003.2104260124 04/26/2021
[ 61.442761][ T5947] RIP: 0010:do_swap_page (mm/memory.c:3990 (discriminator 3))
[ 61.448112][ T5947] Code: 6f 28 31 d2 be 01 00 00 00 4c 89 ff e8 9b 43 03 00 49 c7 47 28 00 00 00 00 4c 89 f9 48 c7 44 24 08 00 00 00 00 e9 cf fb ff ff <0f> 0b 49 8b 45 08 f0 48 83 28 01 0f 85 3f fc ff ff 49 8b 45 08 4c
All code
========
0: 6f outsl %ds:(%rsi),(%dx)
1: 28 31 sub %dh,(%rcx)
3: d2 be 01 00 00 00 sarb %cl,0x1(%rsi)
9: 4c 89 ff mov %r15,%rdi
c: e8 9b 43 03 00 call 0x343ac
11: 49 c7 47 28 00 00 00 movq $0x0,0x28(%r15)
18: 00
19: 4c 89 f9 mov %r15,%rcx
1c: 48 c7 44 24 08 00 00 movq $0x0,0x8(%rsp)
23: 00 00
25: e9 cf fb ff ff jmp 0xfffffffffffffbf9
2a:* 0f 0b ud2 <-- trapping instruction
2c: 49 8b 45 08 mov 0x8(%r13),%rax
30: f0 48 83 28 01 lock subq $0x1,(%rax)
35: 0f 85 3f fc ff ff jne 0xfffffffffffffc7a
3b: 49 8b 45 08 mov 0x8(%r13),%rax
3f: 4c rex.WR
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 49 8b 45 08 mov 0x8(%r13),%rax
6: f0 48 83 28 01 lock subq $0x1,(%rax)
b: 0f 85 3f fc ff ff jne 0xfffffffffffffc50
11: 49 8b 45 08 mov 0x8(%r13),%rax
15: 4c rex.WR
[ 61.468016][ T5947] RSP: 0000:ffa000000bb5fd98 EFLAGS: 00010206
[ 61.474169][ T5947] RAX: ff11000111a47c99 RBX: ffa000000bb5fe08 RCX: 0000002064ac7000
[ 61.482233][ T5947] RDX: 0057ffffc00a106d RSI: 0000000000000043 RDI: ffd400008192b1e8
[ 61.490296][ T5947] RBP: 000000000100c13b R08: 0000000000000000 R09: ffa000000bb5fe08
[ 61.498366][ T5947] R10: 0000000055555554 R11: ff1100018bebbd0c R12: ffd4000044128000
[ 61.506438][ T5947] R13: ff1100205d33d800 R14: ff11000130cd2da8 R15: ffd4000044128000
[ 61.514508][ T5947] FS: 00007f49c900c740(0000) GS:ff11002001000000(0000) knlGS:0000000000000000
[ 61.523534][ T5947] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 61.530225][ T5947] CR2: 00007f4966b3b6b8 CR3: 00000010af786004 CR4: 0000000000771ef0
[ 61.538307][ T5947] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 61.546387][ T5947] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 61.554471][ T5947] PKRU: 55555554
[ 61.558137][ T5947] Call Trace:
[ 61.561544][ T5947] <TASK>
[ 61.564599][ T5947] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 61.568429][ T5947] ? do_trap (arch/x86/kernel/traps.c:112 arch/x86/kernel/traps.c:153)
[ 61.572692][ T5947] ? do_swap_page (mm/memory.c:3990 (discriminator 3))
[ 61.577475][ T5947] ? do_error_trap (arch/x86/include/asm/traps.h:59 arch/x86/kernel/traps.c:174)
[ 61.582172][ T5947] ? do_swap_page (mm/memory.c:3990 (discriminator 3))
[ 61.586966][ T5947] ? exc_invalid_op (arch/x86/kernel/traps.c:265)
[ 61.591743][ T5947] ? do_swap_page (mm/memory.c:3990 (discriminator 3))
[ 61.596515][ T5947] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:568)
[ 61.601638][ T5947] ? do_swap_page (mm/memory.c:3990 (discriminator 3))
[ 61.606412][ T5947] ? do_swap_page (mm/memory.c:3971)
[ 61.611179][ T5947] __handle_mm_fault (mm/memory.c:5274)
[ 61.616203][ T5947] handle_mm_fault (mm/memory.c:5439)
[ 61.621051][ T5947] do_user_addr_fault (arch/x86/mm/fault.c:1365)
[ 61.626151][ T5947] exc_page_fault (arch/x86/include/asm/irqflags.h:37 arch/x86/include/asm/irqflags.h:72 arch/x86/mm/fault.c:1513 arch/x86/mm/fault.c:1561)
[ 61.630824][ T5947] asm_exc_page_fault (arch/x86/include/asm/idtentry.h:570)
[ 61.635748][ T5947] RIP: 0033:0x5612d5878ad6
[ 61.640229][ T5947] Code: 01 00 00 00 e8 1b f9 ff ff 89 c7 e8 6c ff ff ff bf 00 00 00 00 e8 0a f9 ff ff 85 d2 74 08 48 8d 04 f7 48 8b 00 c3 48 8d 04 f7 <48> 89 30 b8 00 00 00 00 c3 41 54 55 53 48 85 ff 0f 84 21 01 00 00
All code
========
0: 01 00 add %eax,(%rax)
2: 00 00 add %al,(%rax)
4: e8 1b f9 ff ff call 0xfffffffffffff924
9: 89 c7 mov %eax,%edi
b: e8 6c ff ff ff call 0xffffffffffffff7c
10: bf 00 00 00 00 mov $0x0,%edi
15: e8 0a f9 ff ff call 0xfffffffffffff924
1a: 85 d2 test %edx,%edx
1c: 74 08 je 0x26
1e: 48 8d 04 f7 lea (%rdi,%rsi,8),%rax
22: 48 8b 00 mov (%rax),%rax
25: c3 ret
26: 48 8d 04 f7 lea (%rdi,%rsi,8),%rax
2a:* 48 89 30 mov %rsi,(%rax) <-- trapping instruction
2d: b8 00 00 00 00 mov $0x0,%eax
32: c3 ret
33: 41 54 push %r12
35: 55 push %rbp
36: 53 push %rbx
37: 48 85 ff test %rdi,%rdi
3a: 0f 84 21 01 00 00 je 0x161
Code starting with the faulting instruction
===========================================
0: 48 89 30 mov %rsi,(%rax)
3: b8 00 00 00 00 mov $0x0,%eax
8: c3 ret
9: 41 54 push %r12
b: 55 push %rbp
c: 53 push %rbx
d: 48 85 ff test %rdi,%rdi
10: 0f 84 21 01 00 00 je 0x137
[ 61.660112][ T5947] RSP: 002b:00007ffd09f037d8 EFLAGS: 00010246
[ 61.666250][ T5947] RAX: 00007f4966b3b6b8 RBX: 000000000000358f RCX: 00000005deece66d
[ 61.674295][ T5947] RDX: 0000000000000000 RSI: 000000002fa0f0d7 RDI: 00007f47e9ac3000
[ 61.682347][ T5947] RBP: 000000002fa0f0d7 R08: 00007ffd09f0386c R09: 0000000000000001
[ 61.690401][ T5947] R10: 00007ffd09f037c0 R11: 0000000000000000 R12: 000000000001ac78
[ 61.698449][ T5947] R13: 00007f47e9ac3000 R14: 00007ffd09f0386c R15: 00007ffd09f03970
[ 61.706500][ T5947] </TASK>
[ 61.709607][ T5947] Modules linked in: kmem xfs loop device_dax nd_pmem dax_pmem nd_btt btrfs blake2b_generic xor raid6_pq libcrc32c intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp sd_mod t10_pi crc64_rocksoft_generic crc64_rocksoft crc64 kvm_intel sg kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel sha512_ssse3 ahci ipmi_ssif rapl intel_cstate ast libahci mei_me drm_shmem_helper i2c_i801 ioatdma acpi_ipmi libata drm_kms_helper mei intel_uncore joydev i2c_smbus intel_pch_thermal dax_hmem dca wmi ipmi_si ipmi_devintf ipmi_msghandler nfit libnvdimm acpi_power_meter acpi_pad drm fuse ip_tables
[ 61.768510][ T5947] ---[ end trace 0000000000000000 ]---
[ 61.786010][ T5947] pstore: backend (erst) writing error (-28)
[ 61.792055][ T5947] RIP: 0010:do_swap_page (mm/memory.c:3990 (discriminator 3))
[ 61.797397][ T5947] Code: 6f 28 31 d2 be 01 00 00 00 4c 89 ff e8 9b 43 03 00 49 c7 47 28 00 00 00 00 4c 89 f9 48 c7 44 24 08 00 00 00 00 e9 cf fb ff ff <0f> 0b 49 8b 45 08 f0 48 83 28 01 0f 85 3f fc ff ff 49 8b 45 08 4c
All code
========
0: 6f outsl %ds:(%rsi),(%dx)
1: 28 31 sub %dh,(%rcx)
3: d2 be 01 00 00 00 sarb %cl,0x1(%rsi)
9: 4c 89 ff mov %r15,%rdi
c: e8 9b 43 03 00 call 0x343ac
11: 49 c7 47 28 00 00 00 movq $0x0,0x28(%r15)
18: 00
19: 4c 89 f9 mov %r15,%rcx
1c: 48 c7 44 24 08 00 00 movq $0x0,0x8(%rsp)
23: 00 00
25: e9 cf fb ff ff jmp 0xfffffffffffffbf9
2a:* 0f 0b ud2 <-- trapping instruction
2c: 49 8b 45 08 mov 0x8(%r13),%rax
30: f0 48 83 28 01 lock subq $0x1,(%rax)
35: 0f 85 3f fc ff ff jne 0xfffffffffffffc7a
3b: 49 8b 45 08 mov 0x8(%r13),%rax
3f: 4c rex.WR
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 49 8b 45 08 mov 0x8(%r13),%rax
6: f0 48 83 28 01 lock subq $0x1,(%rax)
b: 0f 85 3f fc ff ff jne 0xfffffffffffffc50
11: 49 8b 45 08 mov 0x8(%r13),%rax
15: 4c rex.WR
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20231219/202312192319.fa8f5709-oliver.sang@xxxxxxxxx
Hello,
Starting from next-20231214 until next-20231220 have noted regression
where kernel hangs randomly while running virtualization tests [multiple
start-shutdown and reboot] against AMD sev guest type, with below call
trace:
[ 6251.931094] BUG: kernel NULL pointer dereference, address:
0000000000000000
[ 6251.931297] #PF: supervisor read access in kernel mode
[ 6251.931456] #PF: error_code(0x0000) - not-present page
[ 6251.931604] PGD 800011016c067 P4D 800011016c067 PUD 0
[ 6251.931757] Oops: 0000 [#2] PREEMPT SMP NOPTI
[ 6251.931910] CPU: 20 PID: 11025 Comm: GC Thread#42 Kdump: loaded
Tainted: G D 6.7.0-rc6-next-20231219-next-20231219- #1
[ 6251.932259] Hardware name: Dell Inc. PowerEdge R6515/07PXPY, BIOS
2.8.5 08/18/2022
[ 6251.932434] RIP: 0010:swapin_readahead+0x8f/0x4f0
[ 6251.932616] Code: ff 48 8b 8d 68 ff ff ff 8b 75 84 4c 89 e2 48 8b bd
70 ff ff ff e8 91 fb ff ff 48 89 c3 4d 85 e4 74 08 41 f6 44 24 06 01 75
46 <48> 8b 13 48 89 d8 83 e2 40 74 15 8b 53 64 48 83 ea 01 48 23 95 70
[ 6251.933025] RSP: 0018:ffffc9003607fc88 EFLAGS: 00010246
[ 6251.933229] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
000000000000001b
[ 6251.933453] RDX: ffff88812c45b380 RSI: 00000000000d021b RDI:
0000000000000000
[ 6251.933668] RBP: ffffc9003607fd28 R08: ffffc9003607fcbf R09:
00000000000d021b
[ 6251.933885] R10: 0000000000000008 R11: 0000000000000003 R12:
ffffffff9ef16040
[ 6251.934116] R13: ffffc9003607fdf0 R14: 00000000000d021b R15:
ffff88a09ce680b8
[ 6251.934339] FS: 00007fe71cdd9640(0000) GS:ffff88a000300000(0000)
knlGS:0000000000000000
[ 6251.934569] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6251.934802] CR2: 0000000000000000 CR3: 000800011b43a003 CR4:
0000000000770ef0
[ 6251.935067] PKRU: 55555554
[ 6251.935306] Call Trace:
[ 6251.935560] <TASK>
[ 6251.935844] ? show_regs+0x6d/0x80
[ 6251.936098] ? __die+0x29/0x70
[ 6251.936339] ? page_fault_oops+0x15f/0x460
[ 6251.936585] ? psi_group_change+0x175/0x3b0
[ 6251.936830] ? srso_alias_return_thunk+0x5/0xfbef5
[ 6251.937080] ? do_user_addr_fault+0x30f/0x690
[ 6251.937331] ? exc_page_fault+0x7c/0x190
[ 6251.937580] ? asm_exc_page_fault+0x2b/0x30
[ 6251.937834] ? swapin_readahead+0x8f/0x4f0
[ 6251.938087] ? swapin_readahead+0x3c7/0x4f0
[ 6251.938341] ? srso_alias_return_thunk+0x5/0xfbef5
[ 6251.938599] do_swap_page+0x3ae/0xca0
[ 6251.938854] ? srso_alias_return_thunk+0x5/0xfbef5
[ 6251.939110] ? srso_alias_return_thunk+0x5/0xfbef5
[ 6251.939366] ? __pte_offset_map+0x20/0x190
[ 6251.939626] __handle_mm_fault+0x879/0xe80
[ 6251.939890] handle_mm_fault+0xc6/0x2f0
[ 6251.940151] do_user_addr_fault+0x220/0x690
[ 6251.940413] exc_page_fault+0x7c/0x190
[ 6251.940677] asm_exc_page_fault+0x2b/0x30
[ 6251.940941] RIP: 0033:0x7fe7a57ddf24
[ 6251.941205] Code: 16 4d 01 7c c6 68 e9 8b fd ff ff 48 8b 43 38 49 89
44 24 38 48 8b 43 30 49 89 44 24 30 48 8b 43 28 49 89 44 24 28 48 8b 43
20 <49> 89 44 24 20 48 8b 43 18 49 89 44 24 18 48 8b 43 10 49 89 44 24
[ 6251.941777] RSP: 002b:00007fe71cdd8ab0 EFLAGS: 00010213
[ 6251.942072] RAX: 0000000056293b73 RBX: 00000000fbad2aa8 RCX:
00000000fc31eadb
[ 6251.942368] RDX: 00007fe7a5fad308 RSI: 0000000000000010 RDI:
00007fe7a003b950
[ 6251.942662] RBP: 00007fe71cdd8b20 R08: 0000000000040000 R09:
0000000000000000
[ 6251.942957] R10: 0000000000000001 R11: 0000000000000001 R12:
00000000fc31ead8
[ 6251.943253] R13: 0000000000000005 R14: 00007fe550000d50 R15:
0000000000000005
[ 6251.943552] </TASK>
[ 6251.943838] Modules linked in: binfmt_misc tls overlay ib_core
xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT xt_tcpudp nft_compat
x_tables nf_nat_tftp nf_conntrack_tftp bridge stp llc nft_fib_inet
nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4
nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack
nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink sunrpc
nls_iso8859_1 ipmi_ssif intel_rapl_msr intel_rapl_common amd64_edac
kvm_amd kvm rapl joydev input_leds wmi_bmof efi_pstore pcspkr acpi_ipmi
i2c_piix4 k10temp ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter
evbug mac_hid sch_fq_codel xfs libcrc32c mgag200 drm_kms_helper
i2c_algo_bit drm_shmem_helper hid_generic drm crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel sha512_ssse3 usbmouse usbkbd
sha256_ssse3 mpt3sas sha1_ssse3 tg3 usbhid ccp hid raid_class
scsi_transport_sas sp5100_tco wmi dm_mirror dm_region_hash dm_log msr
autofs4 aesni_intel crypto_simd cryptd
[ 6251.946304] CR2: 0000000000000000
[ 6251.946607] ---[ end trace 0000000000000000 ]---
Thanks,
"Aithal, Srikanth" <sraithal@xxxxxxx>