Kernel panic in bnx2x_fw_dump_lvl() function.

Issue

• The following is found in /var/log/messages:

Jan  3 15:43:00 hostname Server Administrator: Instrumentation Service EventID: 1014  System software event: #012Description: An OEM diagnostic event occurred.

• Backtrace in vmcore is:

crash> bt
PID: 264    TASK: ffff880833d16080  CPU: 5   COMMAND: "events/5"
 #0 [ffff880833d1f740] machine_kexec at ffffffff81038f3b
 #1 [ffff880833d1f7a0] crash_kexec at ffffffff810c5b62
 #2 [ffff880833d1f870] oops_end at ffffffff8152c430
 #3 [ffff880833d1f8a0] no_context at ffffffff8104a00b
 #4 [ffff880833d1f8f0] __bad_area_nosemaphore at ffffffff8104a295
 #5 [ffff880833d1f940] bad_area_nosemaphore at ffffffff8104a363
 #6 [ffff880833d1f950] __do_page_fault at ffffffff8104aabf
 #7 [ffff880833d1fa70] do_page_fault at ffffffff8152e37e
 #8 [ffff880833d1faa0] page_fault at ffffffff8152b735
    [exception RIP: bnx2x_fw_dump_lvl+360]
    RIP: ffffffffa02e82b8  RSP: ffff880833d1fb50  RFLAGS: 00010286
    RAX: ffffc9012047f7ff  RBX: ffff8808304766e0  RCX: 0000000000009f91
    RDX: 0000000000000000  RSI: 0000000000000046  RDI: 0000000000000246
    RBP: ffff880833d1fbe0   R8: 0000000000000000   R9: ffffffff81645da0
    R10: 0000000000000001  R11: 0000000000000000  R12: ffffffffa036c7b5
    R13: ffff880830476020  R14: 00000000ffffffff  R15: 00000000fffff7ff
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #9 [ffff880833d1fbe8] bnx2x_fw_command at ffffffffa02f1066 [bnx2x]
#10 [ffff880833d1fc58] bnx2x_send_unload_req at ffffffffa02f4aca [bnx2x]
#11 [ffff880833d1fca8] bnx2x_chip_cleanup at ffffffffa0307060 [bnx2x]
#12 [ffff880833d1fd68] bnx2x_nic_unload at ffffffffa032afe4 [bnx2x]
#13 [ffff880833d1fdd8] bnx2x_sp_rtnl_task at ffffffffa02f969e [bnx2x]
#14 [ffff880833d1fe38] worker_thread at ffffffff81094a20
#15 [ffff880833d1fee8] kthread at ffffffff8109abf6
#16 [ffff880833d1ff48] kernel_thread at ffffffff8100c20a

• bnx2x: Prevent an illegal pointer dereference during panic