RHEL6: general protection fault in "scsi_dma_unmap"

Issue

• general protection fault occurred in function scsi_dma_unmap with below logs:

sd 2:0:0:0: [sda] task abort on host 2, ffff88023712c7c0
sd 2:0:0:0: [sda] task abort on host 2, ffff8801564963c0
sd 2:0:0:0: [sda] task abort on host 2, ffff88015659b7c0
general protection fault: 0000 [#1] SMP 
last sysfs file: /sys/devices/system/cpu/online
CPU 1 
Modules linked in: iptable_filter ip_tables bridge nls_utf8 nfs fscache nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs 8021q garp stp llc ipv6 vsock(U) uinput ppdev parport_pc parport microcode vmware_balloon e1000 sg i2c_piix4 i2c_core vmci(U) 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: speedstep_lib]

Pid: 0, comm: swapper Not tainted 2.6.32-431.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
RIP: 0010:[<ffffffff8138abca>]  [<ffffffff8138abca>] scsi_dma_unmap+0x1a/0x60
RSP: 0018:ffff880028283dc8  EFLAGS: 00010002
RAX: 616f42050074aa00 RBX: ffff8801564963c0 RCX: 0000000071782301
RDX: 000000002f647261 RSI: 6f622f6c65646f6d RDI: ffff8801564963c0
RBP: ffff880028283dc8 R08: ffff88023ce5e000 R09: ffff88023ce5fed8
R10: 000000003deabca7 R11: 0000000000000001 R12: ffff8802377cf3d8
R13: ffff8802370395e0 R14: ffff8802370395e0 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff880028280000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00007eff08baaed8 CR3: 0000000239818000 CR4: 00000000000407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 0, threadinfo ffff88023ce5e000, task ffff88023ce5d540)
Stack:
 ffff880028283df8 ffffffffa00497e8 ffff8800282916e0 ffff8801564963c0
<d> ffff8802377cf3d8 ffff88023703f000 ffff880028283e98 ffffffffa00499b2
<d> 0000000000000000 ffff880028291628 00000000000115e0 0000000000000000
Call Trace:
 <IRQ> 
 [<ffffffffa00497e8>] pvscsi_unmap_buffers+0xe8/0x170 [vmw_pvscsi]
 [<ffffffffa00499b2>] pvscsi_process_completion_ring+0x142/0x350 [vmw_pvscsi]
 [<ffffffffa004a229>] pvscsi_isr+0x39/0xb0 [vmw_pvscsi]
 [<ffffffff810e6ec0>] handle_IRQ_event+0x60/0x170
 [<ffffffff810e981e>] handle_edge_irq+0xde/0x180
 [<ffffffff8100faf9>] handle_irq+0x49/0xa0
 [<ffffffff81530fdc>] do_IRQ+0x6c/0xf0
 [<ffffffff8100b9d3>] ret_from_intr+0x0/0x11
 <EOI> 
 [<ffffffff8103eacb>] ? native_safe_halt+0xb/0x10
 [<ffffffff810167bd>] default_idle+0x4d/0xb0
 [<ffffffff81009fc6>] cpu_idle+0xb6/0x110
 [<ffffffff81520e13>] start_secondary+0x2ac/0x2ef
Code: 7d 73 ce ff 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 0f 1f 44 00 00 8b 57 60 85 d2 74 3b 48 8b 07 8b 4f 4c 48 8b 77 58 <48> 8b 00 4c 8b 88 d8 05 00 00 4d 85 c9 74 27 49 8b 81 c0 01 00 
RIP  [<ffffffff8138abca>] scsi_dma_unmap+0x1a/0x60
 RSP <ffff880028283dc8>