4.14-stable review patch. If anyone has any objections, please let me know.
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commit b5a8ffcae4103a9d823ea3aa3a761f65779fbe2a upstream.
Add a length check in wmi_set_ie to detect unsigned integer overflow.
Signed-off-by: Lior David qca_liord@qca.qualcomm.com Signed-off-by: Maya Erez qca_merez@qca.qualcomm.com Signed-off-by: Kalle Valo kvalo@qca.qualcomm.com Signed-off-by: Ben Hutchings ben.hutchings@codethink.co.uk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/ath/wil6210/wmi.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/wil6210/wmi.c b/drivers/net/wireless/ath/wil6210/wmi.c index ffdd2fa401b1..d63d7c326801 100644 --- a/drivers/net/wireless/ath/wil6210/wmi.c +++ b/drivers/net/wireless/ath/wil6210/wmi.c @@ -1380,8 +1380,14 @@ int wmi_set_ie(struct wil6210_priv *wil, u8 type, u16 ie_len, const void *ie) }; int rc; u16 len = sizeof(struct wmi_set_appie_cmd) + ie_len; - struct wmi_set_appie_cmd *cmd = kzalloc(len, GFP_KERNEL); + struct wmi_set_appie_cmd *cmd;
+ if (len < ie_len) { + rc = -EINVAL; + goto out; + } + + cmd = kzalloc(len, GFP_KERNEL); if (!cmd) { rc = -ENOMEM; goto out;