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authorSudip Mukherjee <sudipm.mukherjee@gmail.com>2015-09-23 19:02:32 +0530
committerJames Bottomley <JBottomley@Odin.com>2015-11-09 17:08:03 -0800
commite79504236548e4c909959ba444f87a12224555ac (patch)
tree645f887cadd3c3fefd4c697d83a2d3c0dc3be9af
parent481ebb3daac39c6c1a8f78f98b823a9c9591616f (diff)
lpfc: fix memory leak and NULL dereference
kmalloc() can return NULL and without checking we were dereferencing it. Moreover if kmalloc succeeds but the function fails in other parts then we were returning the error code but we missed freeing lcb_context. While at it fixed one related checkpatch warning. Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org> Reviewed-by: James Smart <james.smart@avagotech.com> Signed-off-by: James Bottomley <JBottomley@Odin.com>
-rw-r--r--drivers/scsi/lpfc/lpfc_els.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 3feeb447b740..b6fa257ea3e0 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -5173,7 +5173,6 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
rjt_err = LSRJT_CMD_UNSUPPORTED;
goto rjt;
}
- lcb_context = kmalloc(sizeof(struct lpfc_lcb_context), GFP_KERNEL);
if (phba->hba_flag & HBA_FCOE_MODE) {
rjt_err = LSRJT_CMD_UNSUPPORTED;
@@ -5204,6 +5203,12 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
goto rjt;
}
+ lcb_context = kmalloc(sizeof(*lcb_context), GFP_KERNEL);
+ if (!lcb_context) {
+ rjt_err = LSRJT_UNABLE_TPC;
+ goto rjt;
+ }
+
state = (beacon->lcb_sub_command == LPFC_LCB_ON) ? 1 : 0;
lcb_context->sub_command = beacon->lcb_sub_command;
lcb_context->type = beacon->lcb_type;
@@ -5214,6 +5219,7 @@ lpfc_els_rcv_lcb(struct lpfc_vport *vport, struct lpfc_iocbq *cmdiocb,
if (lpfc_sli4_set_beacon(vport, lcb_context, state)) {
lpfc_printf_vlog(ndlp->vport, KERN_ERR,
LOG_ELS, "0193 failed to send mail box");
+ kfree(lcb_context);
lpfc_nlp_put(ndlp);
rjt_err = LSRJT_UNABLE_TPC;
goto rjt;

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