From b83d005e63ba2383738c1818691e973761d1e860 Mon Sep 17 00:00:00 2001 From: James Smart Date: Thu, 1 Jun 2017 21:07:05 -0700 Subject: scsi: lpfc: Fix System panic after loading the driver System panic with general protection fault during driver load The driver uses a static array sli4_hba.handler_name to store the irq handler names. If the io_channel_irqs exceeds the pre-allocated size (32+1), then the driver will overwrite other fields of sli4_hba. Fix: Dynamically allocate handler_name. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- drivers/scsi/lpfc/lpfc_init.c | 11 ++++++----- drivers/scsi/lpfc/lpfc_sli4.h | 4 ++-- 2 files changed, 8 insertions(+), 7 deletions(-) (limited to 'drivers') diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 3064f0768033..a825806036c3 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -9665,6 +9665,7 @@ static int lpfc_sli4_enable_msix(struct lpfc_hba *phba) { int vectors, rc, index; + char *name; /* Set up MSI-X multi-message vectors */ vectors = phba->io_channel_irqs; @@ -9683,9 +9684,9 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba) /* Assign MSI-X vectors to interrupt handlers */ for (index = 0; index < vectors; index++) { - memset(&phba->sli4_hba.handler_name[index], 0, 16); - snprintf((char *)&phba->sli4_hba.handler_name[index], - LPFC_SLI4_HANDLER_NAME_SZ, + name = phba->sli4_hba.hba_eq_hdl[index].handler_name; + memset(name, 0, LPFC_SLI4_HANDLER_NAME_SZ); + snprintf(name, LPFC_SLI4_HANDLER_NAME_SZ, LPFC_DRIVER_HANDLER_NAME"%d", index); phba->sli4_hba.hba_eq_hdl[index].idx = index; @@ -9694,12 +9695,12 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba) if (phba->cfg_fof && (index == (vectors - 1))) rc = request_irq(pci_irq_vector(phba->pcidev, index), &lpfc_sli4_fof_intr_handler, 0, - (char *)&phba->sli4_hba.handler_name[index], + name, &phba->sli4_hba.hba_eq_hdl[index]); else rc = request_irq(pci_irq_vector(phba->pcidev, index), &lpfc_sli4_hba_intr_handler, 0, - (char *)&phba->sli4_hba.handler_name[index], + name, &phba->sli4_hba.hba_eq_hdl[index]); if (rc) { lpfc_printf_log(phba, KERN_WARNING, LOG_INIT, diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h index cf863db27700..28b75e08e044 100644 --- a/drivers/scsi/lpfc/lpfc_sli4.h +++ b/drivers/scsi/lpfc/lpfc_sli4.h @@ -407,8 +407,10 @@ struct lpfc_max_cfg_param { struct lpfc_hba; /* SLI4 HBA multi-fcp queue handler struct */ +#define LPFC_SLI4_HANDLER_NAME_SZ 16 struct lpfc_hba_eq_hdl { uint32_t idx; + char handler_name[LPFC_SLI4_HANDLER_NAME_SZ]; struct lpfc_hba *phba; atomic_t hba_eq_in_use; struct cpumask *cpumask; @@ -480,7 +482,6 @@ struct lpfc_sli4_lnk_info { #define LPFC_SLI4_HANDLER_CNT (LPFC_HBA_IO_CHAN_MAX+ \ LPFC_FOF_IO_CHAN_NUM) -#define LPFC_SLI4_HANDLER_NAME_SZ 16 /* Used for IRQ vector to CPU mapping */ struct lpfc_vector_map_info { @@ -548,7 +549,6 @@ struct lpfc_sli4_hba { uint32_t ue_to_rp; struct lpfc_register sli_intf; struct lpfc_pc_sli4_params pc_sli4_params; - uint8_t handler_name[LPFC_SLI4_HANDLER_CNT][LPFC_SLI4_HANDLER_NAME_SZ]; struct lpfc_hba_eq_hdl *hba_eq_hdl; /* HBA per-WQ handle */ /* Pointers to the constructed SLI4 queues */ -- cgit v1.2.3