From dc6d6d34e1f674b39d91454fca2b826e190e0351 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Thu, 8 Aug 2019 20:01:55 -0700 Subject: [PATCH] scsi: qla2xxx: Check the PCI info string output buffer size Pass the output buffer size to the code that generates a PCI info string and check the output buffer size while generating a PCI info string. Cc: Himanshu Madhani Signed-off-by: Bart Van Assche Tested-by: Himanshu Madhani Reviewed-by: Himanshu Madhani Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_attr.c | 3 +- drivers/scsi/qla2xxx/qla_def.h | 2 +- drivers/scsi/qla2xxx/qla_gbl.h | 2 +- drivers/scsi/qla2xxx/qla_mr.c | 8 ++--- drivers/scsi/qla2xxx/qla_os.c | 59 ++++++++++++++------------------- 5 files changed, 32 insertions(+), 42 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c index e3de20918efb..e9c449ef515c 100644 --- a/drivers/scsi/qla2xxx/qla_attr.c +++ b/drivers/scsi/qla2xxx/qla_attr.c @@ -1125,7 +1125,8 @@ qla2x00_pci_info_show(struct device *dev, struct device_attribute *attr, char pci_info[30]; return scnprintf(buf, PAGE_SIZE, "%s\n", - vha->hw->isp_ops->pci_info_str(vha, pci_info)); + vha->hw->isp_ops->pci_info_str(vha, pci_info, + sizeof(pci_info))); } static ssize_t diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 1c6811bd5625..8c8279ef3e32 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -3112,7 +3112,7 @@ struct isp_operations { void (*update_fw_options) (struct scsi_qla_host *); int (*load_risc) (struct scsi_qla_host *, uint32_t *); - char * (*pci_info_str) (struct scsi_qla_host *, char *); + char * (*pci_info_str)(struct scsi_qla_host *, char *, size_t); char * (*fw_version_str)(struct scsi_qla_host *, char *, size_t); irq_handler_t intr_handler; diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h index fc54e7c86463..2d9664086f15 100644 --- a/drivers/scsi/qla2xxx/qla_gbl.h +++ b/drivers/scsi/qla2xxx/qla_gbl.h @@ -732,7 +732,7 @@ extern int qlafx00_initialize_adapter(struct scsi_qla_host *); extern int qlafx00_soft_reset(scsi_qla_host_t *); extern int qlafx00_chip_diag(scsi_qla_host_t *); extern void qlafx00_config_rings(struct scsi_qla_host *); -extern char *qlafx00_pci_info_str(struct scsi_qla_host *, char *); +extern char *qlafx00_pci_info_str(struct scsi_qla_host *, char *, size_t); extern char *qlafx00_fw_version_str(struct scsi_qla_host *, char *, size_t); extern irqreturn_t qlafx00_intr_handler(int, void *); extern void qlafx00_enable_intrs(struct qla_hw_data *); diff --git a/drivers/scsi/qla2xxx/qla_mr.c b/drivers/scsi/qla2xxx/qla_mr.c index 9e3f2f462a2e..759fcfecc310 100644 --- a/drivers/scsi/qla2xxx/qla_mr.c +++ b/drivers/scsi/qla2xxx/qla_mr.c @@ -688,14 +688,12 @@ qlafx00_config_rings(struct scsi_qla_host *vha) } char * -qlafx00_pci_info_str(struct scsi_qla_host *vha, char *str) +qlafx00_pci_info_str(struct scsi_qla_host *vha, char *str, size_t str_len) { struct qla_hw_data *ha = vha->hw; - if (pci_is_pcie(ha->pdev)) { - strcpy(str, "PCIe iSA"); - return str; - } + if (pci_is_pcie(ha->pdev)) + strlcpy(str, "PCIe iSA", str_len); return str; } diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index e91681cbd75d..a247dce0cb95 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -536,80 +536,70 @@ static void qla2x00_free_queues(struct qla_hw_data *ha) } static char * -qla2x00_pci_info_str(struct scsi_qla_host *vha, char *str) +qla2x00_pci_info_str(struct scsi_qla_host *vha, char *str, size_t str_len) { struct qla_hw_data *ha = vha->hw; - static char *pci_bus_modes[] = { + static const char *const pci_bus_modes[] = { "33", "66", "100", "133", }; uint16_t pci_bus; - strcpy(str, "PCI"); pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9; if (pci_bus) { - strcat(str, "-X ("); - strcat(str, pci_bus_modes[pci_bus]); + snprintf(str, str_len, "PCI-X (%s MHz)", + pci_bus_modes[pci_bus]); } else { pci_bus = (ha->pci_attr & BIT_8) >> 8; - strcat(str, " ("); - strcat(str, pci_bus_modes[pci_bus]); + snprintf(str, str_len, "PCI (%s MHz)", pci_bus_modes[pci_bus]); } - strcat(str, " MHz)"); - return (str); + return str; } static char * -qla24xx_pci_info_str(struct scsi_qla_host *vha, char *str) +qla24xx_pci_info_str(struct scsi_qla_host *vha, char *str, size_t str_len) { - static char *pci_bus_modes[] = { "33", "66", "100", "133", }; + static const char *const pci_bus_modes[] = { + "33", "66", "100", "133", + }; struct qla_hw_data *ha = vha->hw; uint32_t pci_bus; if (pci_is_pcie(ha->pdev)) { - char lwstr[6]; uint32_t lstat, lspeed, lwidth; + const char *speed_str; pcie_capability_read_dword(ha->pdev, PCI_EXP_LNKCAP, &lstat); lspeed = lstat & PCI_EXP_LNKCAP_SLS; lwidth = (lstat & PCI_EXP_LNKCAP_MLW) >> 4; - strcpy(str, "PCIe ("); switch (lspeed) { case 1: - strcat(str, "2.5GT/s "); + speed_str = "2.5GT/s"; break; case 2: - strcat(str, "5.0GT/s "); + speed_str = "5.0GT/s"; break; case 3: - strcat(str, "8.0GT/s "); + speed_str = "8.0GT/s"; break; default: - strcat(str, " "); + speed_str = ""; break; } - snprintf(lwstr, sizeof(lwstr), "x%d)", lwidth); - strcat(str, lwstr); + snprintf(str, str_len, "PCIe (%s x%d)", speed_str, lwidth); return str; } - strcpy(str, "PCI"); pci_bus = (ha->pci_attr & CSRX_PCIX_BUS_MODE_MASK) >> 8; - if (pci_bus == 0 || pci_bus == 8) { - strcat(str, " ("); - strcat(str, pci_bus_modes[pci_bus >> 3]); - } else { - strcat(str, "-X "); - if (pci_bus & BIT_2) - strcat(str, "Mode 2"); - else - strcat(str, "Mode 1"); - strcat(str, " ("); - strcat(str, pci_bus_modes[pci_bus & ~BIT_2]); - } - strcat(str, " MHz)"); + if (pci_bus == 0 || pci_bus == 8) + snprintf(str, str_len, "PCI (%s MHz)", + pci_bus_modes[pci_bus >> 3]); + else + snprintf(str, str_len, "PCI-X Mode %d (%s MHz)", + pci_bus & 4 ? 2 : 1, + pci_bus_modes[pci_bus & 3]); return str; } @@ -3460,7 +3450,8 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) "QLogic %s - %s.\n", ha->model_number, ha->model_desc); ql_log(ql_log_info, base_vha, 0x00fc, "ISP%04X: %s @ %s hdma%c host#=%ld fw=%s.\n", - pdev->device, ha->isp_ops->pci_info_str(base_vha, pci_info), + pdev->device, ha->isp_ops->pci_info_str(base_vha, pci_info, + sizeof(pci_info)), pci_name(pdev), ha->flags.enable_64bit_addressing ? '+' : '-', base_vha->host_no, ha->isp_ops->fw_version_str(base_vha, fw_str, sizeof(fw_str)));