* [PATCH] brcmfmac: fix leak of mypkt on error return path
@ 2019-04-09 11:20 Colin King
2019-04-09 11:32 ` Dan Carpenter
2019-04-09 11:40 ` Arend Van Spriel
0 siblings, 2 replies; 4+ messages in thread
From: Colin King @ 2019-04-09 11:20 UTC (permalink / raw)
To: Arend van Spriel, Franky Lin, Hante Meuleman, Chi-Hsien Lin,
Wright Feng, Kalle Valo, David S . Miller, linux-wireless,
brcm80211-dev-list.pdl, brcm80211-dev-list, netdev
Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
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.
Addresses-Coverity: ("Resource Leak")
Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index ec129864cc9c..f3d11e024e71 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -628,7 +628,7 @@ 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;
@@ -636,7 +636,7 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
if (!err)
err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
mypkt);
-
+out:
brcmu_pkt_buf_free_skb(mypkt);
return err;
--
2.20.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] brcmfmac: fix leak of mypkt on error return path
2019-04-09 11:20 [PATCH] brcmfmac: fix leak of mypkt on error return path Colin King
@ 2019-04-09 11:32 ` Dan Carpenter
2019-04-09 11:35 ` Colin Ian King
2019-04-09 11:40 ` Arend Van Spriel
1 sibling, 1 reply; 4+ messages in thread
From: Dan Carpenter @ 2019-04-09 11:32 UTC (permalink / raw)
To: Colin King
Cc: Arend van Spriel, Franky Lin, Hante Meuleman, Chi-Hsien Lin,
Wright Feng, Kalle Valo, David S . Miller, linux-wireless,
brcm80211-dev-list.pdl, brcm80211-dev-list, netdev,
kernel-janitors, linux-kernel
On Tue, Apr 09, 2019 at 12:20:11PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> 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.
>
> Addresses-Coverity: ("Resource Leak")
> Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> index ec129864cc9c..f3d11e024e71 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> @@ -628,7 +628,7 @@ 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;
> @@ -636,7 +636,7 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
> if (!err)
^^^^
This is not required, btw.
> err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
> mypkt);
> -
> +out:
> brcmu_pkt_buf_free_skb(mypkt);
regards,
dan carpenter
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] brcmfmac: fix leak of mypkt on error return path
2019-04-09 11:32 ` Dan Carpenter
@ 2019-04-09 11:35 ` Colin Ian King
0 siblings, 0 replies; 4+ messages in thread
From: Colin Ian King @ 2019-04-09 11:35 UTC (permalink / raw)
To: Dan Carpenter
Cc: Arend van Spriel, Franky Lin, Hante Meuleman, Chi-Hsien Lin,
Wright Feng, Kalle Valo, David S . Miller, linux-wireless,
brcm80211-dev-list.pdl, brcm80211-dev-list, netdev,
kernel-janitors, linux-kernel
On 09/04/2019 12:32, Dan Carpenter wrote:
> On Tue, Apr 09, 2019 at 12:20:11PM +0100, Colin King wrote:
>> From: Colin Ian King <colin.king@canonical.com>
>>
>> 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.
>>
>> Addresses-Coverity: ("Resource Leak")
>> Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
>> ---
>> drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
>> index ec129864cc9c..f3d11e024e71 100644
>> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
>> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
>> @@ -628,7 +628,7 @@ 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;
>> @@ -636,7 +636,7 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
>> if (!err)
> ^^^^
> This is not required, btw.
Good point.
>
>> err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
>> mypkt);
>> -
>> +out:
>> brcmu_pkt_buf_free_skb(mypkt);
>
> regards,
> dan carpenter
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] brcmfmac: fix leak of mypkt on error return path
2019-04-09 11:20 [PATCH] brcmfmac: fix leak of mypkt on error return path Colin King
2019-04-09 11:32 ` Dan Carpenter
@ 2019-04-09 11:40 ` Arend Van Spriel
1 sibling, 0 replies; 4+ messages in thread
From: Arend Van Spriel @ 2019-04-09 11:40 UTC (permalink / raw)
To: Colin King, Franky Lin, Hante Meuleman, Chi-Hsien Lin,
Wright Feng, Kalle Valo, David S . Miller, linux-wireless,
brcm80211-dev-list.pdl, brcm80211-dev-list, netdev
Cc: kernel-janitors, linux-kernel
On 4/9/2019 1:20 PM, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> 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.
>
> Addresses-Coverity: ("Resource Leak")
> Fixes: a7c3aa1509e2 ("brcmfmac: Remove brcmf_sdiod_addrprep()")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
> drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> index ec129864cc9c..f3d11e024e71 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
> @@ -628,7 +628,7 @@ 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;
Actually seems you can just get rid of the if statement entirely as
below it skips brcmf_sdiod_skbuff_write() when an error occurred so no
label is necessary.
Regards,
Arend
> addr &= SBSDIO_SB_OFT_ADDR_MASK;
> addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
> @@ -636,7 +636,7 @@ int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes)
> if (!err)
> err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr,
> mypkt);
> -
> +out:
> brcmu_pkt_buf_free_skb(mypkt);
>
> return err;
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-04-09 11:40 UTC | newest]
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2019-04-09 11:20 [PATCH] brcmfmac: fix leak of mypkt on error return path Colin King
2019-04-09 11:32 ` Dan Carpenter
2019-04-09 11:35 ` Colin Ian King
2019-04-09 11:40 ` Arend Van Spriel
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