diff mbox series

[v3] wifi: brcm80211: handle pmk_op allocation failure

Message ID 20240229103153.18533-1-duoming@zju.edu.cn
State New
Headers
Series [v3] wifi: brcm80211: handle pmk_op allocation failure |

Commit Message

Duoming Zhou Feb. 29, 2024, 10:31 a.m. UTC 
  The kzalloc() in brcmf_pmksa_v3_op() will return null if the
physical memory has run out. As a result, if we dereference
the null value, the null pointer dereference bug will happen.

Return -ENOMEM from brcmf_pmksa_v3_op() if kzalloc() fails
for pmk_op.

Fixes: a96202acaea4 ("wifi: brcmfmac: cfg80211: Add support for PMKID_V3 operations")
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
---
Changes in v3:
  - Just return -ENOMEM.

 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 3 +++
 1 file changed, 3 insertions(+)

Comments

Arend van Spriel Feb. 29, 2024, 11:36 a.m. UTC | #1 
On 2/29/2024 11:31 AM, Duoming Zhou wrote:
> The kzalloc() in brcmf_pmksa_v3_op() will return null if the
> physical memory has run out. As a result, if we dereference
> the null value, the null pointer dereference bug will happen.
> 
> Return -ENOMEM from brcmf_pmksa_v3_op() if kzalloc() fails
> for pmk_op.
> 
> Fixes: a96202acaea4 ("wifi: brcmfmac: cfg80211: Add support for PMKID_V3 operations")
> Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>

For real this time. Thanks!!

Regards,
Arend

> Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
> ---
> Changes in v3:
>    - Just return -ENOMEM.
> 
>   drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 3 +++
>   1 file changed, 3 insertions(+)
Kees Cook March 1, 2024, 12:40 a.m. UTC | #2 
On Thu, Feb 29, 2024 at 06:31:53PM +0800, Duoming Zhou wrote:
> The kzalloc() in brcmf_pmksa_v3_op() will return null if the
> physical memory has run out. As a result, if we dereference
> the null value, the null pointer dereference bug will happen.
> 
> Return -ENOMEM from brcmf_pmksa_v3_op() if kzalloc() fails
> for pmk_op.
> 
> Fixes: a96202acaea4 ("wifi: brcmfmac: cfg80211: Add support for PMKID_V3 operations")
> Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
> Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>

Thanks for the respin! :)

Reviewed-by: Kees Cook <keescook@chromium.org>
diff mbox series

Patch

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 28d6a30cc01..1a5d7494f5e 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -4322,6 +4322,9 @@  brcmf_pmksa_v3_op(struct brcmf_if *ifp, struct cfg80211_pmksa *pmksa,
 	int ret;
 
 	pmk_op = kzalloc(sizeof(*pmk_op), GFP_KERNEL);
+	if (!pmk_op)
+		return -ENOMEM;
+
 	pmk_op->version = cpu_to_le16(BRCMF_PMKSA_VER_3);
 
 	if (!pmksa) {