From fe9803b58dce15848465ab0270ccea29f4a5c4bb Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Mon, 17 Sep 2012 15:20:22 +0530 Subject: [PATCH] DMA: PL330: Fix potential NULL pointer dereference in pl330_submit_req() commit 2e2c682becb20416c140aa0d6d3137b51a5c76da upstream. 'r->cfg' is being checked for NULL. However, it is dereferenced in the previous statements. Thus moving those statements within the check. Signed-off-by: Sachin Kamat Acked-by: Jassi Brar Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/pl330.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 8c44f17..69f1c4d 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -1568,17 +1568,19 @@ static int pl330_submit_req(void *ch_id, struct pl330_req *r) goto xfer_exit; } - /* Prefer Secure Channel */ - if (!_manager_ns(thrd)) - r->cfg->nonsecure = 0; - else - r->cfg->nonsecure = 1; /* Use last settings, if not provided */ - if (r->cfg) + if (r->cfg) { + /* Prefer Secure Channel */ + if (!_manager_ns(thrd)) + r->cfg->nonsecure = 0; + else + r->cfg->nonsecure = 1; + ccr = _prepare_ccr(r->cfg); - else + } else { ccr = readl(regs + CC(thrd->id)); + } /* If this req doesn't have valid xfer settings */ if (!_is_valid(ccr)) { -- 2.7.4