Comment 13 for bug 1733662

4.13.0-14 failed when offlining CPU 9:

[ 104.500965] ------------[ cut here ]------------
[ 104.500968] kernel BUG at /build/linux-0p6sBa/linux-4.13.0/mm/slub.c:3878!
[ 104.501256] invalid opcode: 0000 [#1] SMP
[ 104.501422] Modules linked in: nls_iso8859_1 kvm_intel kvm irqbypass joydev input_leds ipmi_ssif ipmi_si ipmi_devintf ipmi_msghandler acpi_pad ib_iser rdma_cm iw_cm ib_cm ib_core 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 hid_generic igb crct10dif_pclmul crc32_pclmul ghash_clmulni_intel usbhid pcbc hid aesni_intel dca aes_x86_64 crypto_simd ptp glue_helper cryptd ahci pps_core i2c_algo_bit libahci megaraid_sas
[ 104.503659] CPU: 9 PID: 63 Comm: cpuhp/9 Not tainted 4.13.0-14-generic #15-Ubuntu
[ 104.504019] Hardware name: Cisco Systems Inc UCSC-C240-M4L/UCSC-C240-M4L, BIOS C240M4.2.0.10c.0.032320160820 03/23/2016
[ 104.504537] task: ffff9a9838b6ae80 task.stack: ffffb7e90c7b8000
[ 104.504827] RIP: 0010:kfree+0x11c/0x160
[ 104.505003] RSP: 0018:ffffb7e90c7bbd60 EFLAGS: 00010246
[ 104.505311] RAX: ffffd9d77eff0020 RBX: ffff9a9800000000 RCX: 00000001802a001a
[ 104.505617] RDX: 0000000000000000 RSI: ffffd9d77fe02400 RDI: 000065a740000000
[ 104.505938] RBP: ffffb7e90c7bbd78 R08: ffff9a9838091ec0 R09: 00000001802a001a
[ 104.506255] R10: ffffd9d77f000000 R11: 0000000000000000 R12: ffffffff87798960
[ 104.506763] R13: ffffffff869dd4f0 R14: 0000000000000009 R15: 0000000000000001
[ 104.507216] FS: 0000000000000000(0000) GS:ffff9a983f240000(0000) knlGS:0000000000000000
[ 104.507638] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 104.507884] CR2: 00007ffdd8f1bff8 CR3: 00000016ff209000 CR4: 00000000001406e0
[ 104.508188] Call Trace:
[ 104.508311] kfree_const+0x20/0x30
[ 104.508468] kobject_put+0x91/0x1a0
[ 104.508626] device_unregister+0x28/0x60
[ 104.508796] cpu_cache_sysfs_exit+0x5a/0xc0
[ 104.508971] ? free_cache_attributes.part.7+0x110/0x110
[ 104.509201] cacheinfo_cpu_pre_down+0x48/0x50
[ 104.509401] cpuhp_invoke_callback+0x84/0x3b0
[ 104.509616] cpuhp_down_callbacks+0x42/0x80
[ 104.509812] cpuhp_thread_fun+0x88/0xe0
[ 104.509997] smpboot_thread_fn+0xec/0x160
[ 104.510182] kthread+0x125/0x140
[ 104.510322] ? sort_range+0x30/0x30
[ 104.510491] ? kthread_create_on_node+0x70/0x70
[ 104.510706] ret_from_fork+0x25/0x30
[ 104.510870] Code: 08 49 83 c4 18 48 89 da 4c 89 ee ff d0 49 8b 04 24 48 85 c0 75 e6 e9 0e ff ff ff 49 8b 02 f6 c4 80 75 0a 49 8b 42 20 a8 01 75 02 <0f> 0b 49 8b 02 31 f6 f6 c4 80 74 04 41 8b 72 6c 4c 89 d7 e8 2c
[ 104.511761] RIP: kfree+0x11c/0x160 RSP: ffffb7e90c7bbd60
[ 104.512003] ---[ end trace 2290fcc444ad32ff ]---

Bash remained active, but I couldn't issue any significant commands.