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[next] ath11k: add missing null check on allocated skb

Message ID 20201214232417.84556-1-colin.king@canonical.com (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series [next] ath11k: add missing null check on allocated skb | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Colin King Dec. 14, 2020, 11:24 p.m. UTC 
From: Colin Ian King <colin.king@canonical.com>

Currently the null check on a newly allocated skb is missing and
this can lead to a null pointer dereference is the allocation fails.
Fix this by adding a null check and returning -ENOMEM.

Addresses-Coverity: ("Dereference null return")
Fixes: 43ed15e1ee01 ("ath11k: put hw to DBS using WMI_PDEV_SET_HW_MODE_CMDID")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/net/wireless/ath/ath11k/wmi.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Kalle Valo Dec. 17, 2020, 6:36 a.m. UTC | #1 
Colin King <colin.king@canonical.com> wrote:

> Currently the null check on a newly allocated skb is missing and
> this can lead to a null pointer dereference is the allocation fails.
> Fix this by adding a null check and returning -ENOMEM.
> 
> Addresses-Coverity: ("Dereference null return")
> Fixes: 43ed15e1ee01 ("ath11k: put hw to DBS using WMI_PDEV_SET_HW_MODE_CMDID")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath-current branch of ath.git, thanks.

c86a36a621f2 ath11k: add missing null check on allocated skb
Kalle Valo Dec. 17, 2020, 6:39 a.m. UTC | #2 
Kalle Valo <kvalo@codeaurora.org> writes:

> Colin King <colin.king@canonical.com> wrote:
>
>> Currently the null check on a newly allocated skb is missing and
>> this can lead to a null pointer dereference is the allocation fails.
>> Fix this by adding a null check and returning -ENOMEM.
>> 
>> Addresses-Coverity: ("Dereference null return")
>> Fixes: 43ed15e1ee01 ("ath11k: put hw to DBS using WMI_PDEV_SET_HW_MODE_CMDID")
>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
>> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
>
> Patch applied to ath-current branch of ath.git, thanks.
>
> c86a36a621f2 ath11k: add missing null check on allocated skb

I did a mistake and that commit id will change, so please disregard
this. There will be a new mail soon.
Kalle Valo Dec. 17, 2020, 6:45 a.m. UTC | #3 
Colin King <colin.king@canonical.com> wrote:

> Currently the null check on a newly allocated skb is missing and
> this can lead to a null pointer dereference is the allocation fails.
> Fix this by adding a null check and returning -ENOMEM.
> 
> Addresses-Coverity: ("Dereference null return")
> Fixes: 43ed15e1ee01 ("ath11k: put hw to DBS using WMI_PDEV_SET_HW_MODE_CMDID")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath-current branch of ath.git, thanks.

292bff9480c8 ath11k: add missing null check on allocated skb
diff mbox series

Patch

diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index da4b546b62cb..c869ff479212 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -3460,6 +3460,8 @@  int ath11k_wmi_set_hw_mode(struct ath11k_base *ab,
 	len = sizeof(*cmd);
 
 	skb = ath11k_wmi_alloc_skb(wmi_ab, len);
+	if (!skb)
+		return -ENOMEM;
 	cmd = (struct wmi_pdev_set_hw_mode_cmd_param *)skb->data;
 
 	cmd->tlv_header = FIELD_PREP(WMI_TLV_TAG, WMI_TAG_PDEV_SET_HW_MODE_CMD) |