From: Norbert van Bolhuis <nvbolhuis@xxxxxxxxx>
The scatter-gather handling uses a pre-allocated list (with nents entries).
If the driver runs out of sg entries it will result in an oops. Let's detect
this instead and make the SDIO block transfer fail.
Signed-off-by: Norbert van Bolhuis <nvbolhuis@xxxxxxxxx>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index 42d991d9f8cb..60eb95fc19a5 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -455,6 +455,11 @@ static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev,
if (sg_data_sz > max_req_sz - req_sz)
sg_data_sz = max_req_sz - req_sz;
+ if (!sgl) {
+ /* out of (pre-allocated) scatterlist entries */
+ ret = -ENOMEM;
+ goto exit;
+ }
sg_set_buf(sgl, pkt_data, sg_data_sz);
sg_cnt++;
--
2.42.0
