When using DUMP on SLI3 to read VPD and Port status data (config region 23), the adapter is overruning the kmalloc'd buffer causing havoc on other consumers of the allocation pools. Rework the loops processing the dump data and validate/size memory lengths before performing bcopy's. Signed-off-by: Dick Kennedy <dick.kennedy@xxxxxxxxxxxx> Signed-off-by: James Smart <jsmart2021@xxxxxxxxx> --- drivers/scsi/lpfc/lpfc_init.c | 14 ++++++++------ drivers/scsi/lpfc/lpfc_sli.c | 14 +++++++------- 2 files changed, 15 insertions(+), 13 deletions(-) diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c index 69a5249e007a..287a78185dc7 100644 --- a/drivers/scsi/lpfc/lpfc_init.c +++ b/drivers/scsi/lpfc/lpfc_init.c @@ -253,13 +253,15 @@ lpfc_config_port_prep(struct lpfc_hba *phba) */ if (mb->un.varDmp.word_cnt == 0) break; - if (mb->un.varDmp.word_cnt > DMP_VPD_SIZE - offset) - mb->un.varDmp.word_cnt = DMP_VPD_SIZE - offset; + + i = mb->un.varDmp.word_cnt * sizeof(uint32_t); + if (offset + i > DMP_VPD_SIZE) + i = DMP_VPD_SIZE - offset; lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET, - lpfc_vpd_data + offset, - mb->un.varDmp.word_cnt); - offset += mb->un.varDmp.word_cnt; - } while (mb->un.varDmp.word_cnt && offset < DMP_VPD_SIZE); + lpfc_vpd_data + offset, i); + offset += i; + } while (offset < DMP_VPD_SIZE); + lpfc_parse_vpd(phba, lpfc_vpd_data, offset); kfree(lpfc_vpd_data); diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 3c61a6d72a1a..c598bef5cad4 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -19347,7 +19347,7 @@ lpfc_sli_get_config_region23(struct lpfc_hba *phba, char *rgn23_data) LPFC_MBOXQ_t *pmb = NULL; MAILBOX_t *mb; uint32_t offset = 0; - int rc; + int i, rc; if (!rgn23_data) return 0; @@ -19377,14 +19377,14 @@ lpfc_sli_get_config_region23(struct lpfc_hba *phba, char *rgn23_data) */ if (mb->un.varDmp.word_cnt == 0) break; - if (mb->un.varDmp.word_cnt > DMP_RGN23_SIZE - offset) - mb->un.varDmp.word_cnt = DMP_RGN23_SIZE - offset; + i = mb->un.varDmp.word_cnt * sizeof(uint32_t); + if (offset + i > DMP_RGN23_SIZE) + i = DMP_RGN23_SIZE - offset; lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET, - rgn23_data + offset, - mb->un.varDmp.word_cnt); - offset += mb->un.varDmp.word_cnt; - } while (mb->un.varDmp.word_cnt && offset < DMP_RGN23_SIZE); + rgn23_data + offset, i); + offset += i; + } while (offset < DMP_RGN23_SIZE); mempool_free(pmb, phba->mbox_mem_pool); return offset; -- 2.25.0
