linux-kernel - Re: [PATCH] dma: edma: Fix memory leak

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Thu, 24 Oct 2013 22:20:55 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Valentin Ilie <valentin.ilie@...il.com>,
	Joel Fernandes <joelf@...com>, dma <dmaengine@...r.kernel.org>
Cc:	dan.j.williams@...el.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dma: edma: Fix memory leak

On Thu, Oct 24, 2013 at 04:14:22PM +0300, Valentin Ilie wrote:
> When it fails to allocate a slot, edesc should be free'd before return;
> 
> Signed-off-by: Valentin Ilie <valentin.ilie@...il.com>
> ---
>  drivers/dma/edma.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
> index 098a8da..79ebac6 100644
> --- a/drivers/dma/edma.c
> +++ b/drivers/dma/edma.c
> @@ -305,6 +305,7 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg(
>  				edma_alloc_slot(EDMA_CTLR(echan->ch_num),
>  						EDMA_SLOT_ANY);
>  			if (echan->slot[i] < 0) {
> +				kfree(edesc);
>  				dev_err(dev, "Failed to allocate slot\n");
>  				return NULL;
>  			}
Applied along with one more fix on the same line

-><8--
From: Vinod Koul <vinod.koul@...el.com>
Date: Thu, 24 Oct 2013 22:17:50 +0530
Subject: [PATCH] dmaengine: edma: fix another memory leak

commit 4b6271a6 fix a menory leak but one more existed in driver so fix that

Signed-off-by: Vinod Koul <vinod.koul@...el.com>
---
 drivers/dma/edma.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 134fa96..10b577f 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -347,6 +347,7 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg(
 			ccnt = sg_dma_len(sg) / (acnt * bcnt);
 			if (ccnt > (SZ_64K - 1)) {
 				dev_err(dev, "Exceeded max SG segment size\n");
+				kfree(edesc);
 				return NULL;
 			}
 			cidx = acnt * bcnt;
-- 
1.7.0.4

~Vinod
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/