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 <dick.kenn...@broadcom.com>
Signed-off-by: James Smart <james.sm...@broadcom.com>
---
drivers/scsi/lpfc/lpfc_init.c | 11 ++++++-----
drivers/scsi/lpfc/lpfc_sli4.h | 4 ++--
2 files changed, 8 insertions(+), 7 deletions(-)
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 */
--
2.11.0
