RHEL8: kernel: refcount_t overflow at get_net_ns_by_pid+0x46/0x60 in java[304025], uid/euid: 310/310

Issue

• Kernel warning with logs:

Sep 10 15:15:29 localhost kernel: ------------[ cut here ]------------
Sep 10 15:15:29 localhost kernel: refcount_t overflow at get_net_ns_by_pid+0x46/0x60 in java[304025], uid/euid: 310/310
Sep 10 15:15:29 localhost kernel: WARNING: CPU: 0 PID: 304025 at kernel/panic.c:704 refcount_error_report+0x94/0x99
Sep 10 15:15:29 localhost kernel: Modules linked in: asm(OE) uas usb_storage d2dctl(OE) oracleacfs(POE) oracleadvm(POE) oracleoks(POE) sha512_ssse3 sha512_generic joydev vxfen(POE) vcsmm(POE) vxodm(POE) vxglm(POE) vxgms(POE) gab(POE) xt_CHECKSUM ipt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 nft_compat nft_counter nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink tun bridge stp llc dmpaa(POE) vxspec(POE) vxio(POE) vxdmp(POE) llt(POE) amf(POE) rdma_cm iw_cm vxcafs(POE) ib_cm vxportal(POE) fdd(POE) vxfs(POE) veki(POE) team_mode_activebackup team dell_rbu tcp_diag inet_diag sunrpc vfat nls_utf8 fat isofs cdrom loop dm_round_robin dm_multipath intel_rapl_msr intel_rapl_common isst_if_common skx_edac nfit libnvdimm x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel dell_smbios iTCO_wdt iTCO_vendor_support dell_wmi_descriptor wmi_bmof dcdbas rapl intel_cstate pcspkr intel_uncore ipmi_ssif i40iw st bnxt_re
Sep 10 15:15:29 localhost kernel:  ib_uverbs ib_core mei_me i2c_i801 lpc_ich mei wmi acpi_ipmi ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter binfmt_misc ip_tables xfs libcrc32c sd_mod sg lpfc mgag200 drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops nvmet_fc drm nvmet nvme_fc nvme_fabrics i40e nvme_core ahci libahci t10_pi crc32c_intel libata bnxt_en megaraid_sas scsi_transport_fc tg3 i2c_algo_bit dm_mirror dm_region_hash dm_log dm_mod fuse
Sep 10 15:15:29 localhost kernel: CPU: 0 PID: 304025 Comm: java Kdump: loaded Tainted: P          IOE    --------- -  - 4.18.0-305.el8.x86_64 #1
Sep 10 15:15:29 localhost kernel: Hardware name: Dell Inc. PowerEdge R740/0DY2X0, BIOS 2.13.3 12/13/2021
Sep 10 15:15:29 localhost kernel: RIP: 0010:refcount_error_report+0x94/0x99
Sep 10 15:15:29 localhost kernel: Code: 8b 84 24 00 09 00 00 48 8b 95 80 00 00 00 49 8d 8c 24 e0 0a 00 00 41 55 41 89 c1 48 89 de 48 c7 c7 30 98 ab 94 e8 05 00 00 00 <0f> 0b 58 eb 8f 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 c7 c7 90
Sep 10 15:15:29 localhost kernel: RSP: 0018:ffffb776cd97fae0 EFLAGS: 00010282
Sep 10 15:15:29 localhost kernel: RAX: 0000000000000000 RBX: ffffffff94ac99d8 RCX: 0000000000000007
Sep 10 15:15:29 localhost kernel: RDX: 0000000000000007 RSI: 0000000000000096 RDI: ffff9d6cffc167c0
Sep 10 15:15:29 localhost kernel: RBP: ffffb776cd97fb98 R08: 0000000000001f72 R09: 0000000000000004
Sep 10 15:15:29 localhost kernel: R10: 0000000000000000 R11: 0000000000000001 R12: ffff9d62c6f1bd80
Sep 10 15:15:29 localhost kernel: R13: 0000000000000136 R14: 0000000000000000 R15: ffffb776cd97fb98
Sep 10 15:15:29 localhost kernel: FS:  00007f4bf1e7c700(0000) GS:ffff9d6cffc00000(0000) knlGS:0000000000000000
Sep 10 15:15:29 localhost kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Sep 10 15:15:29 localhost kernel: CR2: 00007fd901c545e0 CR3: 000000120afe2005 CR4: 00000000007706f0
Sep 10 15:15:29 localhost kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Sep 10 15:15:29 localhost kernel: DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Sep 10 15:15:29 localhost kernel: PKRU: 55555554
Sep 10 15:15:29 localhost kernel: Call Trace:
Sep 10 15:15:29 localhost kernel:  ex_handler_refcount+0x4e/0x80
Sep 10 15:15:29 localhost kernel:  fixup_exception+0x33/0x3e
Sep 10 15:15:29 localhost kernel:  do_trap+0x4c/0x110
Sep 10 15:15:29 localhost kernel:  ? __noinstr_text_end+0x1584/0x2a02
Sep 10 15:15:29 localhost kernel:  do_invalid_op+0x36/0x40
Sep 10 15:15:29 localhost kernel:  ? __noinstr_text_end+0x1584/0x2a02
Sep 10 15:15:29 localhost kernel:  invalid_op+0x14/0x20
Sep 10 15:15:29 localhost kernel: RIP: 0010:get_net_ns_by_pid+0x46/0x60
Sep 10 15:15:29 localhost kernel: Code: a0 b8 0b 00 00 48 89 c3 4c 89 e7 e8 84 18 1c 00 48 8b 83 28 0b 00 00 48 85 c0 74 0e 48 8b 68 28 f0 ff 45 04 0f 88 d7 23 1b 00 <4c> 89 e7 c6 07 00 0f 1f 40 00 48 89 e8 5b 5d 41 5c c3 0f 1f 84 00
Sep 10 15:15:29 localhost kernel: RSP: 0018:ffffb776cd97fc40 EFLAGS: 00010a96
Sep 10 15:15:29 localhost kernel: RAX: ffffffff95058740 RBX: ffff9d62c6f1bd80 RCX: ffffffff951a53c4
Sep 10 15:15:29 localhost kernel: RDX: 0000000000000001 RSI: 000000000004a399 RDI: ffff9d62c6f1c938
Sep 10 15:15:29 localhost kernel: RBP: ffffffff951a53c0 R08: ffff9d61dde026c8 R09: ffff9d61dde027b8
Sep 10 15:15:29 localhost kernel: R10: 0000000000000000 R11: ffffffff95058370 R12: ffff9d62c6f1c938
Sep 10 15:15:29 localhost kernel: R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
Sep 10 15:15:29 localhost kernel:  asm_socket_create+0xfb/0x1b0 [asm]
Sep 10 15:15:29 localhost kernel:  security_socket_create+0x38/0x50
Sep 10 15:15:29 localhost kernel:  __sock_create+0x63/0x1a0
Sep 10 15:15:29 localhost kernel:  __sys_socketpair+0xee/0x240
Sep 10 15:15:29 localhost kernel:  __x64_sys_socketpair+0x1a/0x20
Sep 10 15:15:29 localhost kernel:  do_syscall_64+0x5b/0x1a0
Sep 10 15:15:29 localhost kernel:  entry_SYSCALL_64_after_hwframe+0x65/0xca
Sep 10 15:15:29 localhost kernel: RIP: 0033:0x7f4c8e6a547e
Sep 10 15:15:29 localhost kernel: Code: 48 8b 0d 0d 0a 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 35 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d da 09 2c 00 f7 d8 64 89 01 48
Sep 10 15:15:29 localhost kernel: RSP: 002b:00007f4bf1e7a938 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
Sep 10 15:15:29 localhost kernel: RAX: ffffffffffffffda RBX: 00007f4bf1e7ab28 RCX: 00007f4c8e6a547e
Sep 10 15:15:29 localhost kernel: RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
Sep 10 15:15:29 localhost kernel: RBP: 00007f4bf1e7a9b0 R08: 0000000000000000 R09: 0000000000000000
Sep 10 15:15:29 localhost kernel: R10: 00007f4be4077868 R11: 0000000000000246 R12: 00007f4be4013088
Sep 10 15:15:29 localhost kernel: R13: 00007f4be403e5a0 R14: 0000000000000000 R15: 0000000000000fa0
Sep 10 15:15:29 localhost kernel: ---[ end trace 22899099fc1cfcdf ]---