The kernel hangs up after a flood of list_del corruption messages are logged where ep_unregister_pollwait() --> remove_wait_queue() --> list_del() are called.

Issue

• The kernel hangs up after a flood of list_del corruption messages are logged where ep_unregister_pollwait() --> remove_wait_queue() --> list_del() are called.

[922934.870103] ------------[ cut here ]------------
[922934.871066] WARNING: CPU: 1 PID: 1090 at lib/list_debug.c:53 __list_del_entry+0x63/0xd0
[922934.872044] list_del corruption, ffff92eb48b888a0->next is LIST_POISON1 (dead000000000100)
[922934.873025] Modules linked in: varonis_drv(POE) netlink_diag unix_diag event_collector_2_0_324607(OE) vmw_vsock_vmci_transport vsock sb_edac iosf_mbi crc32_pclmul ppdev ghash_clmulni_intel vmw_balloon aesni_intel lrw gf128mul glue_helper ablk_helper cryptd sg pcspkr parport_pc parport vmw_vmci i2c_piix4 auth_rpcgss sunrpc binfmt_misc ip_tables ext4 mbcache jbd2 ata_generic pata_acpi vmwgfx sd_mod drm_kms_helper crc_t10dif crct10dif_generic syscopyarea sysfillrect sysimgblt fb_sys_fops ttm ahci drm nfit libahci ata_piix libnvdimm libata crct10dif_pclmul crct10dif_common crc32c_intel serio_raw vmxnet3 vmw_pvscsi drm_panel_orientation_quirks dm_mirror dm_region_hash dm_log dm_mod fuse
[922934.878277] CPU: 1 PID: 1090 Comm: sssd_nss Kdump: loaded Tainted: P        W  OE  ------------   3.10.0-1160.24.1.el7.x86_64 #1
[922934.879319] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 12/12/2018
[922934.880324] Call Trace:
[922934.881311]  [<ffffffffb158308a>] dump_stack+0x19/0x1b
[922934.882293]  [<ffffffffb0e9b1b8>] __warn+0xd8/0x100
[922934.883249]  [<ffffffffb0e9b23f>] warn_slowpath_fmt+0x5f/0x80
[922934.884202]  [<ffffffffb11a60f3>] __list_del_entry+0x63/0xd0
[922934.885164]  [<ffffffffb11a616d>] list_del+0xd/0x30
[922934.886118]  [<ffffffffb0ec6a76>] remove_wait_queue+0x26/0x40
[922934.887086]  [<ffffffffb109c98a>] ep_unregister_pollwait.isra.6+0x3a/0x60
[922934.888055]  [<ffffffffb109c9d2>] ep_remove+0x22/0xc0
[922934.889028]  [<ffffffffb109de82>] SyS_epoll_ctl+0x4e2/0xc80
[922934.889987]  [<ffffffffb1595f92>] system_call_fastpath+0x25/0x2a
[922934.890941] ---[ end trace ac55477fd625a26b ]---