From: Colin Ian King <[email protected]>
Currently if the call to brcmf_sdiod_set_backplane_window fails then
then error return path leaks mypkt. Fix this by returning by a new
error path labelled 'out' that calls brcmu_pkt_buf_free_skb to free
mypkt. Also remove redundant check on err before calling
brcmf_sdiod_skbuff_write.
Addresses-Coverity: ("Resource Leak")
Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
Signed-off-by: Colin Ian King <[email protected]>
---
V2: Remove redundant check on err before calling
brcmf_sdiod_skbuff_write, kudos to Dan Carpenter and Arend Van Spriel
for spotting this.
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index ec129864cc9c..60aede5abb4d 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -628,15 +628,13 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
err = brcmf_sdiod_set_backplane_window(sdiodev, addr);
if (err)
- return err;
+ goto out;
addr &= SBSDIO_SB_OFT_ADDR_MASK;
addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
- if (!err)
- err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
- mypkt);
-
+ err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr, mypkt);
+out:
brcmu_pkt_buf_free_skb(mypkt);
return err;
--
2.20.1
On 4/9/2019 1:43 PM, Colin King wrote:
> From: Colin Ian King <[email protected]>
>
> Currently if the call to brcmf_sdiod_set_backplane_window fails then
> then error return path leaks mypkt. Fix this by returning by a new
> error path labelled 'out' that calls brcmu_pkt_buf_free_skb to free
> mypkt. Also remove redundant check on err before calling
> brcmf_sdiod_skbuff_write.
>
> Addresses-Coverity: ("Resource Leak")
> Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
> Signed-off-by: Colin Ian King <[email protected]>
> ---
>
> V2: Remove redundant check on err before calling
> brcmf_sdiod_skbuff_write, kudos to Dan Carpenter and Arend Van Spriel
> for spotting this.
>
> ---
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> index ec129864cc9c..60aede5abb4d 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> @@ -628,15 +628,13 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
>
> err = brcmf_sdiod_set_backplane_window(sdiodev, addr);
> if (err)
> - return err;
> + goto out;
>
> addr &= SBSDIO_SB_OFT_ADDR_MASK;
> addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
>
> - if (!err)
> - err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
> - mypkt);
> -
> + err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr, mypkt);
> +out:
I am fine with it, but my suggestion was a bit different:
err = brcmf_sdiod_set_backplane_window(sdiodev, addr);
if (!err) {
addr &= SBSDIO_SB_OFT_ADDR_MASK;
addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2,
addr, mypkt);
}
> brcmu_pkt_buf_free_skb(mypkt);
>
> return err;
>
On Tue, Apr 09, 2019 at 01:50:38PM +0200, Arend Van Spriel wrote:
> On 4/9/2019 1:43 PM, Colin King wrote:
> > From: Colin Ian King <[email protected]>
> >
> > Currently if the call to brcmf_sdiod_set_backplane_window fails then
> > then error return path leaks mypkt. Fix this by returning by a new
> > error path labelled 'out' that calls brcmu_pkt_buf_free_skb to free
> > mypkt. Also remove redundant check on err before calling
> > brcmf_sdiod_skbuff_write.
> >
> > Addresses-Coverity: ("Resource Leak")
> > Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
> > Signed-off-by: Colin Ian King <[email protected]>
> > ---
> >
> > V2: Remove redundant check on err before calling
> > brcmf_sdiod_skbuff_write, kudos to Dan Carpenter and Arend Van Spriel
> > for spotting this.
> >
> > ---
> > drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 8 +++-----
> > 1 file changed, 3 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> > index ec129864cc9c..60aede5abb4d 100644
> > --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> > +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> > @@ -628,15 +628,13 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
> > err = brcmf_sdiod_set_backplane_window(sdiodev, addr);
> > if (err)
> > - return err;
> > + goto out;
> > addr &= SBSDIO_SB_OFT_ADDR_MASK;
> > addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
> > - if (!err)
> > - err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
> > - mypkt);
> > -
> > + err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr, mypkt);
> > +out:
>
> I am fine with it, but my suggestion was a bit different:
>
> err = brcmf_sdiod_set_backplane_window(sdiodev, addr);
> if (!err) {
> addr &= SBSDIO_SB_OFT_ADDR_MASK;
> addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
> err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2,
> addr, mypkt);
> }
Success handling always leads to extra indenting like this... It's
less confusing to do failure handling keep the normal/success path at
indent level 1.
regards,
dan carpenter
On 09.04.2019 14:43, Colin King wrote:
> From: Colin Ian King <[email protected]>
>
> Currently if the call to brcmf_sdiod_set_backplane_window fails then
> then error return path leaks mypkt. Fix this by returning by a new
One "then" is enough. :-)
> error path labelled 'out' that calls brcmu_pkt_buf_free_skb to free
> mypkt. Also remove redundant check on err before calling
> brcmf_sdiod_skbuff_write.
>
> Addresses-Coverity: ("Resource Leak")
> Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
> Signed-off-by: Colin Ian King <[email protected]>
[...]
MBR, Sergei
On 4/9/2019 5:13 PM, Colin King wrote:
> From: Colin Ian King <[email protected]>
>
> Currently if the call to brcmf_sdiod_set_backplane_window fails then
Fix this one extra then pointed by Sergie.
otherwise looks good to me.
Reviewed-by: Mukesh Ojha <[email protected]>
Cheers,
-Mukesh
> then error return path leaks mypkt. Fix this by returning by a new
> error path labelled 'out' that calls brcmu_pkt_buf_free_skb to free
> mypkt. Also remove redundant check on err before calling
> brcmf_sdiod_skbuff_write.
>
> Addresses-Coverity: ("Resource Leak")
> Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
> Signed-off-by: Colin Ian King <[email protected]>
> ---
>
> V2: Remove redundant check on err before calling
> brcmf_sdiod_skbuff_write, kudos to Dan Carpenter and Arend Van Spriel
> for spotting this.
>
> ---
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> index ec129864cc9c..60aede5abb4d 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> @@ -628,15 +628,13 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
>
> err = brcmf_sdiod_set_backplane_window(sdiodev, addr);
> if (err)
> - return err;
> + goto out;
>
> addr &= SBSDIO_SB_OFT_ADDR_MASK;
> addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
>
> - if (!err)
> - err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
> - mypkt);
> -
> + err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr, mypkt);
> +out:
> brcmu_pkt_buf_free_skb(mypkt);
>
> return err;
Colin King <[email protected]> wrote:
> From: Colin Ian King <[email protected]>
>
> Currently if the call to brcmf_sdiod_set_backplane_window fails then
> error return path leaks mypkt. Fix this by returning by a new
> error path labelled 'out' that calls brcmu_pkt_buf_free_skb to free
> mypkt. Also remove redundant check on err before calling
> brcmf_sdiod_skbuff_write.
>
> Addresses-Coverity: ("Resource Leak")
> Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
> Signed-off-by: Colin Ian King <[email protected]>
> Reviewed-by: Mukesh Ojha <[email protected]>
Patch applied to wireless-drivers-next.git, thanks.
a927e8d8ab57 brcmfmac: fix leak of mypkt on error return path
--
https://patchwork.kernel.org/patch/10891135/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches