Why we have kernel panic at "qla24xx_queuecommand+421" ?

Issue

• We have a kernel panic with following traces :

PID: 875    TASK: ffff81083ee49080  CPU: 0   COMMAND: "scsi_eh_4"
 #0 [ffff81083d0f5ad0] crash_kexec at ffffffff800aaa0c
 #1 [ffff81083d0f5b90] __die at ffffffff8006520f
 #2 [ffff81083d0f5bd0] do_page_fault at ffffffff80066e1c
 #3 [ffff81083d0f5cc0] error_exit at ffffffff8005dde9
    [exception RIP: qla24xx_queuecommand+421]
    RIP: ffffffff8813c0cf  RSP: ffff81083d0f5d70  RFLAGS: 00010002
    RAX: 0000000000000002  RBX: 0000000000000246  RCX: 0000000000000000
    RDX: ffff81083cd60000  RSI: ffffffff880785a5  RDI: ffff81083cd60060
    RBP: ffff81083d0f04f8   R8: 0000000000000000   R9: 0000000000000000
    R10: ffff81039f2bca40  R11: 0000000000000060  R12: ffff81039f2bc980
    R13: 0000000000000000  R14: ffff81083d0f04f8  R15: ffffffff880785a5
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #4 [ffff81083d0f5da8] scsi_send_eh_cmnd at ffffffff880782b7 [scsi_mod]
 #5 [ffff81083d0f5e58] scsi_eh_tur at ffffffff88078556 [scsi_mod]
 #6 [ffff81083d0f5e78] scsi_error_handler at ffffffff880791be [scsi_mod]
 #7 [ffff81083d0f5ee8] kthread at ffffffff80032360
 #8 [ffff81083d0f5f48] kernel_thread at ffffffff8005dfb1