From fbd1cd202739558210fd8f441b36601b29050bf4 Mon Sep 17 00:00:00 2001 From: Paul Zimmerman Date: Fri, 22 Nov 2013 16:43:46 -0800 Subject: [PATCH] staging: dwc2: fix potential use after free dwc2_process_non_isoc_desc() can potentially free the qtd, so null out the qtd pointer if the call fails so we don't try to access it later Signed-off-by: Paul Zimmerman Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dwc2/hcd_ddma.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/staging/dwc2/hcd_ddma.c b/drivers/staging/dwc2/hcd_ddma.c index c7d434519776..72e9788c1a13 100644 --- a/drivers/staging/dwc2/hcd_ddma.c +++ b/drivers/staging/dwc2/hcd_ddma.c @@ -1103,8 +1103,10 @@ static void dwc2_complete_non_isoc_xfer_ddma(struct dwc2_hsotg *hsotg, for (i = 0; i < qtd->n_desc; i++) { if (dwc2_process_non_isoc_desc(hsotg, chan, chnum, qtd, desc_num, halt_status, - &xfer_done)) + &xfer_done)) { + qtd = NULL; break; + } desc_num++; } } -- 2.20.1