システムがクラッシュし、"kernel BUG at mm/usercopy.c:102!" というメッセージが表示される

Issue

• システムがクラッシュし、以下のログが表示されました。

...
[3635864.887576] usercopy: Kernel memory overwrite attempt detected to SLUB object 'kmalloc-8k' (offset 24, size 8190)!
[3635864.887643] ------------[ cut here ]------------
[3635864.887644] kernel BUG at mm/usercopy.c:102!
[3635864.887667] invalid opcode: 0000 [#1] SMP PTI
[3635864.887671] CPU: 2 PID: 1034798 Comm: sosreport Tainted: P           OE    --------- -  - 4.18.0-193.19.1.el8_2.x86_64 #1
[3635864.887673] Hardware name: Red Hat RHEV Hypervisor, BIOS 1.11.0-2.el7 04/01/2014
[3635864.887685] RIP: 0010:usercopy_abort+0x74/0x76
[3635864.887688] Code: 0f 45 c6 51 48 89 f9 48 c7 c2 35 5e 6b 99 41 52 48 c7 c6 a5 33 6a 99 48 c7 c7 00 5f 6b 99 48 0f 45 f2 48 89 c2 e8 1f ad e5 ff <0f> 0b 49 89 f0 48 89 f9 44 89 e2 31 f6 48 c7 c7 5c 5e 6b 99 e8 73
[3635864.887690] RSP: 0018:ffffaaef0877fd10 EFLAGS: 00010246
[3635864.887692] RAX: 0000000000000066 RBX: ffff9bd76a8f2018 RCX: 0000000000000000
[3635864.887694] RDX: 0000000000000000 RSI: ffff9bd76f896a08 RDI: ffff9bd76f896a08
[3635864.887695] RBP: 0000000000001ffe R08: 000000000000037a R09: 0000000000000077
[3635864.887696] R10: 0000000000000000 R11: ffffaaef0877fbc0 R12: 0000000000000000
[3635864.887697] R13: ffff9bd76a8f4016 R14: 00007ffffffff000 R15: ffff9bd4af3697c0
[3635864.887699] FS:  00007fa1ea5be700(0000) GS:ffff9bd76f880000(0000) knlGS:0000000000000000
[3635864.887701] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[3635864.887702] CR2: 00007fa1f7f7c28f CR3: 000000016a324000 CR4: 00000000000406e0
[3635864.887707] Call Trace:
[3635864.887730]  __check_heap_object+0xda/0x110
[3635864.887738]  __check_object_size+0xff/0x16b
[3635864.887744]  strncpy_from_user+0x4f/0x1b0
[3635864.887779]  my_strncpy_from_user+0x5/0x10 [sisips]
[3635864.887790]  ? AppfireCreateProcess+0x2a0/0x4d0 [sisips]
[3635864.887797]  ? sisips64_sys_execve+0x12c/0x215 [sisips]
[3635864.887805]  ? sym_procfs_printf+0xa5/0xa5 [symev_custom_4_18_0_193_19_1_el8_2_x86_64]
[3635864.887812]  ? do_syscall_64+0x5b/0x1a0
[3635864.887818]  ? entry_SYSCALL_64_after_hwframe+0x65/0xca
[3635864.887820] Modules linked in: binfmt_misc overlay fuse nft_chain_route_ipv4 xt_CHECKSUM nft_chain_nat_ipv4 ipt_MASQUERADE nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 nft_counter nft_compat symap_custom_4_18_0_193_19_1_el8_2_x86_64(POE) nf_tables nfnetlink tun bridge stp llc rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver sisfim(PE) nfs lockd grace fscache symev_custom_4_18_0_193_19_1_el8_2_x86_64(OE) sunrpc intel_rapl_msr intel_rapl_common crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcspkr joydev virtio_balloon i2c_piix4 sisips(PE) ip_tables xfs libcrc32c sr_mod cdrom ata_generic sd_mod sg qxl drm_kms_helper syscopyarea sysfillrect ata_piix sysimgblt fb_sys_fops ttm drm libata crc32c_intel virtio_net serio_raw net_failover failover virtio_console virtio_scsi dm_mirror dm_region_hash dm_log dm_mod
[3635864.887890] ---[ end trace b0b66d4e025f3db6 ]---
[3635864.887893] RIP: 0010:usercopy_abort+0x74/0x76
[3635864.887895] Code: 0f 45 c6 51 48 89 f9 48 c7 c2 35 5e 6b 99 41 52 48 c7 c6 a5 33 6a 99 48 c7 c7 00 5f 6b 99 48 0f 45 f2 48 89 c2 e8 1f ad e5 ff <0f> 0b 49 89 f0 48 89 f9 44 89 e2 31 f6 48 c7 c7 5c 5e 6b 99 e8 73
[3635864.887897] RSP: 0018:ffffaaef0877fd10 EFLAGS: 00010246
[3635864.887898] RAX: 0000000000000066 RBX: ffff9bd76a8f2018 RCX: 0000000000000000
[3635864.887899] RDX: 0000000000000000 RSI: ffff9bd76f896a08 RDI: ffff9bd76f896a08
[3635864.887900] RBP: 0000000000001ffe R08: 000000000000037a R09: 0000000000000077
[3635864.887901] R10: 0000000000000000 R11: ffffaaef0877fbc0 R12: 0000000000000000
[3635864.887902] R13: ffff9bd76a8f4016 R14: 00007ffffffff000 R15: ffff9bd4af3697c0
[3635864.887904] FS:  00007fa1ea5be700(0000) GS:ffff9bd76f880000(0000) knlGS:0000000000000000
[3635864.887905] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[3635864.887906] CR2: 00007fa1f7f7c28f CR3: 000000016a324000 CR4: 00000000000406e0
[3635864.887910] Kernel panic - not syncing: Fatal exception
[3635864.888644] Kernel Offset: 0x17600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[3635864.888649] ---[ end Kernel panic - not syncing: Fatal exception ]---