general protection fault vs Oops

[Subhashini Rao Beerisetty]

Hi all,

In my Linux box, I see that kernel crashes for a known test case.

In the first attempt when I run that test case I landed into âgeneral
protection fault: 0000 [#1] SMP" .. Next I rebooted and ran the same
test , but now it resulted the âOops: 0002 [#1] SMP".
In both cases the call trace looks exactly same and RIP points to
ânative_queued_spin_lock_slowpath+0xfe/0x170"..

So, can some one clarify me , what are the difference between âgeneral
protection fault: 0000 [#1] SMP" & âOops: 0002 [#1] SMP". In which
scenario kernel throws âOops: 0002 [#1] SMP" Or âgeneral protection
fault: 0000 [#1] SMP"..


May 16 12:06:17 test-pc kernel: [96934.528114] general protection
fault: 0000 [#1] SMP
May 16 12:06:17 test-pc kernel: [96934.528990] Modules linked in:
dbg(OE) mcore(OE) osa(OE) cfg80211 ppdev intel_rapl intel_soc_dts_iosf
intel_powerclamp coretemp kvm irqbypass punit_atom_debug cdc_acm
mei_txe  mei lpc_ich shpchp parport_pc mac_hid parport tpm_infineon
8250_fintek ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr
iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor
async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915
aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd igb
drm_kms_helper dca syscopyarea ptp sysfillrect sysimgblt pps_core
fb_sys_fops i2c_algo_bit drm ahci libahci fjes video [last unloaded:
osa]
May 16 12:06:17 test-pc kernel: [96934.537343] CPU: 2 PID: 5457 Comm:
multi/complete Tainted: G           OE   4.4.0-66-generic #87-Ubuntu
May 16 12:06:17 test-pc kernel: [96934.538715] Hardware name:
Supermicro Super Server/X10SDV-TLN4F, BIOS 1.0b 09/09/2015
May 16 12:06:17 test-pc kernel: [96934.540146] task: ffff880139d02640
ti: ffff880034fe0000 task.ti: ffff880034fe0000
May 16 12:06:17 test-pc kernel: [96934.541632] RIP:
0010:[<ffffffff810cafee>]  [<ffffffff810cafee>]
native_queued_spin_lock_slowpath+0xfe/0x170
May 16 12:06:17 test-pc kernel: [96934.543224] RSP:
0018:ffff880034fe3e08  EFLAGS: 00010002
May 16 12:06:17 test-pc kernel: [96934.544837] RAX: 0000000000002be1
RBX: 0000000000000082 RCX: 0004b8107b8cc138
May 16 12:06:17 test-pc kernel: [96934.546511] RDX: ffff88013fd17900
RSI: 00000000000c0000 RDI: ffff8800b35fbb88
May 16 12:06:17 test-pc kernel: [96934.548213] RBP: ffff880034fe3e08
R08: 0000000000000101 R09: 0000000180200019
May 16 12:06:17 test-pc kernel: [96934.549949] R10: ffff8800340c9680
R11: 0000000000000001 R12: ffff8800b35fbb88
May 16 12:06:17 test-pc kernel: [96934.551713] R13: 0000000000000246
R14: 0000000000000001 R15: ffff8800340c9d00
May 16 12:06:17 test-pc kernel: [96934.553501] FS:
0000000000000000(0000) GS:ffff88013fd00000(0000)
knlGS:0000000000000000
May 16 12:06:17 test-pc kernel: [96934.555346] CS:  0010 DS: 0000 ES:
0000 CR0: 000000008005003b
May 16 12:06:17 test-pc kernel: [96934.557216] CR2: 00007ffe8614d938
CR3: 00000000b35ef000 CR4: 00000000001006e0
May 16 12:06:17 test-pc kernel: [96934.559146] Stack:
May 16 12:06:17 test-pc kernel: [96934.561081]  ffff880034fe3e20
ffffffff8183c427 ffff8800b35fbb70 ffff880034fe3e50
May 16 12:06:17 test-pc kernel: [96934.563133]  ffffffffc0606812
ffff880035581cc0 ffff8800b1eb5ec8 0000000000000246
May 16 12:06:17 test-pc kernel: [96934.565220]  ffff8800b1eb5ef0
ffff880034fe3e60 ffffffffc06aa2a4 ffff880034fe3ea
May 16 12:06:17 test-pc kernel: [96934.567347] Call Trace:
May 16 12:06:17 test-pc kernel: [96934.569475]  [<ffffffff8183c427>]
_raw_spin_lock_irqsave+0x37/0x40
May 16 12:06:17 test-pc kernel: [96934.571686]  [<ffffffffc0606812>]
event_raise+0x22/0x60 [osa]
May 16 12:06:17 test-pc kernel: [96934.573935]  [<ffffffffc06aa2a4>]
multi_q_completed_one_buffer+0x34/0x40 [mcore]
May 16 12:06:17 test-pc kernel: [96934.576236]  [<ffffffffc06a919e>]
complete_thread+0x7e/0x110 [mcore]
May 16 12:06:17 test-pc kernel: [96934.578567]  [<ffffffffc0606a10>] ?
thread_should_stop+0x10/0x10 [osa]
May 16 12:06:17 test-pc kernel: [96934.580934]  [<ffffffffc0606a26>]
thread_func+0x16/0x50 [osa]
May 16 12:06:17 test-pc kernel: [96934.583326]  [<ffffffffc0606a10>] ?
thread_should_stop+0x10/0x10 [osa]
May 16 12:06:17 test-pc kernel: [96934.585762]  [<ffffffff810a0ba8>]
kthread+0xd8/0xf0
May 16 12:06:17 test-pc kernel: [96934.588219]  [<ffffffff810a0ad0>] ?
kthread_create_on_node+0x1e0/0x1e0
May 16 12:06:17 test-pc kernel: [96934.590724]  [<ffffffff8183c98f>]
ret_from_fork+0x3f/0x70
May 16 12:06:17 test-pc kernel: [96934.593251]  [<ffffffff810a0ad0>] ?
kthread_create_on_node+0x1e0/0x1e0
May 16 12:06:17 test-pc kernel: [96934.595822] Code: 87 47 02 c1 e0 10
85 c0 74 38 48 89 c1 c1 e8 12 48 c1 e9 0c 83 e8 01 83 e1 30 48 98 48
81 c1 00 79 01 00 48 03 0c c5 40 75 f3 81 <48> 89 11 8b 42 08 85 c0 75
0d f3 90 8b 42 08 85 c0 74 f7 eb 02
May 16 12:06:17 test-pc kernel: [96934.601479] RIP
[<ffffffff810cafee>] native_queued_spin_lock_slowpath+0xfe/0x17
May 16 12:06:17 test-pc kernel: [96934.604306]  RSP <ffff880034fe3e08>
May 16 12:06:17 test-pc kernel: [96934.617229] ---[ end trace
0b60bd63d72bdffa ]---





May 16 12:59:22 test-pc kernel: [ 3011.360710] BUG: unable to handle
kernel paging request at 0000000000017900
May 16 12:59:22 test-pc kernel: [ 3011.361623] IP:
[<ffffffff810cafee>] native_queued_spin_lock_slowpath+0xfe/0x170
May 16 12:59:22 test-pc kernel: [ 3011.362547] PGD
May 16 12:59:22 test-pc kernel: [ 3011.363419] Oops: 0002 [#1] SMP
May 16 12:59:22 test-pc kernel: [ 3011.364298] Modules linked in:
dbg(OE) mcore(OE) osa(OE) cfg80211 ppdev intel_rapl intel_soc_dts_iosf
intel_powerclamp coretemp kvm irqbypass punit_atom_debug cdc_acm
mei_txe  mei lpc_ich shpchp parport_pc mac_hid parport tpm_infineon
8250_fintek ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr
iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor
async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel i915
aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd igb
drm_kms_helper dca syscopyarea ptp sysfillrect sysimgblt pps_core
fb_sys_fops i2c_algo_bit drm ahci libahci fjes video [last unloaded:
osa]
May 16 12:59:22 test-pc kernel: [ 3011.373097] CPU: 1 PID: 4103 Comm:
multi/complete Tainted: G           OE   4.4.0-66-generic #87-Ubunt
May 16 12:59:22 test-pc kernel: [ 3011.374622] Hardware name:
Supermicro Super Server/X10SDV-TLN4F, BIOS 1.0b 09/09/2015
May 16 12:59:22 test-pc kernel: [ 3011.376203] task: ffff8800b3b972c0
ti: ffff8800b1cb0000 task.ti: ffff8800b1cb0000
May 16 12:59:22 test-pc kernel: [ 3011.377825] RIP:
0010:[<ffffffff810cafee>]  [<ffffffff810cafee>]
native_queued_spin_lock_slowpath+0xfe/0x170
May 16 12:59:22 test-pc kernel: [ 3011.379575] RSP:
0018:ffff8800b1cb3e08  EFLAGS: 00010006
May 16 12:59:22 test-pc kernel: [ 3011.381324] RAX: 0000000000000e8c
RBX: 0000000000000082 RCX: 000000000001790
May 16 12:59:22 test-pc kernel: [ 3011.383141] RDX: ffff88013fc97900
RSI: 0000000000080000 RDI: ffff88013a347b88
May 16 12:59:22 test-pc kernel: [ 3011.384997] RBP: ffff8800b1cb3e08
R08: 0000000000000101 R09: 0000000180200003
May 16 12:59:22 test-pc kernel: [ 3011.386878] R10: ffff880034fb4580
R11: 0000000000000001 R12: ffff88013a347b88
May 16 12:59:22 test-pc kernel: [ 3011.388792] R13: 0000000000000246
R14: 0000000000000001 R15: ffff880034fb4100
May 16 12:59:22 test-pc kernel: [ 3011.390726] FS:
0000000000000000(0000) GS:ffff88013fc80000(0000)
knlGS:0000000000000000
May 16 12:59:22 test-pc kernel: [ 3011.392722] CS:  0010 DS: 0000 ES:
0000 CR0: 000000008005003b
May 16 12:59:22 test-pc kernel: [ 3011.394738] CR2: 0000000000017900
CR3: 0000000001e0a000 CR4: 00000000001006e0
May 16 12:59:22 test-pc kernel: [ 3011.396819] Stack:
May 16 12:59:22 test-pc kernel: [ 3011.398896]  ffff8800b1cb3e20
ffffffff8183c427 ffff88013a347b70 ffff8800b1cb3e50
May 16 12:59:22 test-pc kernel: [ 3011.401093]  ffffffffc0604812
ffff8800b49f46c0 ffff880034a238c8 0000000000000246
May 16 12:59:22 test-pc kernel: [ 3011.403327]  ffff880034a238f0
ffff8800b1cb3e60 ffffffffc06b72a4 ffff8800b1cb3ea8
May 16 12:59:22 test-pc kernel: [ 3011.405602] Call Trace:
May 16 12:59:22 test-pc kernel: [ 3011.407892]  [<ffffffff8183c427>]
_raw_spin_lock_irqsave+0x37/0x40
May 16 12:59:22 test-pc kernel: [ 3011.410256]  [<ffffffffc0604812>]
event_raise+0x22/0x60 [osa]
May 16 12:59:22 test-pc kernel: [ 3011.412652]  [<ffffffffc06b72a4>]
multi_q_completed_one_buffer+0x34/0x40 [mcore]
May 16 12:59:22 test-pc kernel: [ 3011.415103]  [<ffffffffc06b619e>]
complete_thread+0x7e/0x110 [mcore]
May 16 12:59:22 test-pc kernel: [ 3011.417584]  [<ffffffffc0604a10>] ?
thread_should_stop+0x10/0x10 [osa]
May 16 12:59:22 test-pc kernel: [ 3011.420113]  [<ffffffffc0604a26>]
thread_func+0x16/0x50 [osa
May 16 12:59:22 test-pc kernel: [ 3011.422654]  [<ffffffffc0604a10>] ?
thread_should_stop+0x10/0x10 [osa]
May 16 12:59:22 test-pc kernel: [ 3011.425241]  [<ffffffff810a0ba8>]
kthread+0xd8/0xf0
May 16 12:59:22 test-pc kernel: [ 3011.427857]  [<ffffffff810a0ad0>] ?
kthread_create_on_node+0x1e0/0x1e0
May 16 12:59:22 test-pc kernel: [ 3011.430511]  [<ffffffff8183c98f>]
ret_from_fork+0x3f/0x70
May 16 12:59:22 test-pc kernel: [ 3011.433185]  [<ffffffff810a0ad0>] ?
kthread_create_on_node+0x1e0/0x1e0
May 16 12:59:22 test-pc kernel: [ 3011.435915] Code: 87 47 02 c1 e0 10
85 c0 74 38 48 89 c1 c1 e8 12 48 c1 e9 0c 83 e8 01 83 e1 30 48 98 48
81 c1 00 79 01 00 48 03 0c c5 40 75 f3 81 <48>
89 11 8b 42 08 85 c0 75 0d f3 90 8b 42 08 85 c0 74 f7 eb 02
May 16 12:59:22 test-pc kernel: [ 3011.441870] RIP
[<ffffffff810cafee>] native_queued_spin_lock_slowpath+0xfe/0x170
May 16 12:59:22 test-pc kernel: [ 3011.444858]  RSP <ffff8800b1cb3e08>
May 16 12:59:22 test-pc kernel: [ 3011.447817] CR2: 000000000001790
May 16 12:59:22 test-pc kernel: [ 3011.460906] ---[ end trace
0337c6fc94b1cb3d ]---

Thanks