Soft lockup in is_descendant+0x80/0xa0 [seos]

Issue

• Soft lockup in seos module with following call trace:

seos: module license 'Proprietary' taints kernel.
Disabling lock debugging due to kernel taint
SEOS Syscall Monitor - ACTIVATED
BUG: soft lockup - CPU#3 stuck for 67s! [pstack:1129]
Modules linked in: seos(P)(U) nfsd exportfs nfs lockd fscache auth_rpcgss nfs_acl sunrpc vsock(U) ipv6 ppdev parport_pc parport vmware_balloon vmxnet3 sg vmci(U) i2c_piix4 i2c_core shpchp ext4 jbd2 mbcache sd_mod crc_t10dif sr_mod cdrom vmw_pvscsi pata_acpi ata_generic ata_piix dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
CPU 3 
Modules linked in: seos(P)(U) nfsd exportfs nfs lockd fscache auth_rpcgss nfs_acl sunrpc vsock(U) ipv6 ppdev parport_pc parport vmware_balloon vmxnet3 sg vmci(U) i2c_piix4 i2c_core shpchp ext4 jbd2 mbcache sd_mod crc_t10dif sr_mod cdrom vmw_pvscsi pata_acpi ata_generic ata_piix dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]

Pid: 1129, comm: pstack Tainted: P           ---------------    2.6.32-431.17.1.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
RIP: 0010:[<ffffffffa03291c0>]  [<ffffffffa03291c0>] is_descendant+0x80/0xa0 [seos]
RSP: 0018:ffff880568cc9da8  EFLAGS: 00000246
RAX: ffff880631d54aa0 RBX: ffff880568cc9db8 RCX: 0000000000000000
RDX: 000000000000045a RSI: ffffffff81aa4500 RDI: 0000000000000469
RBP: ffffffff8100bb8e R08: 2000000000000000 R09: 4b48000000000000
R10: 5a40000000000000 R11: 0000000000000430 R12: 0000000000000286
R13: ffff880568cc9d78 R14: ffffffffa032f2f8 R15: ffff880568cc9d38
FS:  00007fddcca3f700(0000) GS:ffff88003e860000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000044fc20 CR3: 000000057e2a5000 CR4: 00000000000007e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process pstack (pid: 1129, threadinfo ffff880568cc8000, task ffff8806312fcaa0)
Stack:
 0000000000000469 ffff8806344b4000 ffff880568cc9dd8 ffffffffa03441b8
<d> 0000000000000469 0000000000000469 ffff880568cc9de8 ffffffffa0344235
<d> ffff880568cc9e18 ffffffffa03244cd ffff880568cc9e18 00000000a0327ecb
Call Trace:
 [<ffffffffa03441b8>] ? eAC_IsFamilyPid+0x28/0x90 [seos]
 [<ffffffffa0344235>] ? eAC_Family_i_am+0x15/0x20 [seos]
 [<ffffffffa03244cd>] ? SEOS_kbl_should_change_path+0x4d/0x1b0 [seos]
 [<ffffffffa0327fc4>] ? SEOS_execve+0xa4/0x160 [seos]
 [<ffffffffa0333ff4>] ? SEOS_check_exec+0x1a4/0x260 [seos]
 [<ffffffffa03324db>] ? ac_pn_alloc+0x1b/0x40 [seos]
 [<ffffffffa0334638>] ? my_execve+0x1d8/0x240 [seos]
 [<ffffffff8108920d>] ? sys_rt_sigaction+0x8d/0xd0
 [<ffffffff8100b4ca>] ? stub_execve+0x6a/0xc0
Code: 75 dd 31 d2 48 8b 05 a8 bf 26 00 f0 ff 00 5b 89 d0 41 5c c9 c3 66 0f 1f 44 00 00 5b 31 d2 89 d0 41 5c c9 c3 0f 1f 80 00 00 00 00 <48> 8b 80 c0 04 00 00 eb a6 0f 1f 80 00 00 00 00 ba 01 00 00 00