github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-25 07:33:19 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

wifi: ath11k: fix use after free in ath11k_dp_rx_msdu_coalesce()

Browse Source 
In ath11k_dp_rx_msdu_coalesce() the loop uses ->is_continuation after
the dev_kfree_skb_any(). This can cause a use after free kfence.

Use flag for caching is_continuation for use after the
dev_kfree_skb_any().

Fixes: d5c65159f2 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Signed-off-by: Willmar Knikker <willmar@met-dubbel-l.nl>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>
Link: https://patch.msgid.link/20260505171709.547274-1-willmar@met-dubbel-l.nl
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
This commit is contained in:
Willmar Knikker 2026-05-05 17:17:43 +00:00 committed by Jeff Johnson
parent 2a2451a34a
commit 72b8654e3b
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/wireless/ath/ath11k/dp_rx.c
View File

@ -1761,6 +1761,7 @@ static int ath11k_dp_rx_msdu_coalesce(struct ath11k *ar,
int buf_first_hdr_len, buf_first_len;
struct hal_rx_desc *ldesc;
int space_extra, rem_len, buf_len;
bool is_continuation;
u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;
/* As the msdu is spread across multiple rx buffers,
@ -1810,7 +1811,8 @@ static int ath11k_dp_rx_msdu_coalesce(struct ath11k *ar,
rem_len = msdu_len - buf_first_len;
while ((skb = __skb_dequeue(msdu_list)) != NULL && rem_len > 0) {
rxcb = ATH11K_SKB_RXCB(skb);
if (rxcb->is_continuation)
is_continuation = rxcb->is_continuation;
if (is_continuation)
buf_len = DP_RX_BUFFER_SIZE - hal_rx_desc_sz;
else
buf_len = rem_len;
@ -1828,7 +1830,7 @@ static int ath11k_dp_rx_msdu_coalesce(struct ath11k *ar,
dev_kfree_skb_any(skb);
rem_len -= buf_len;
if (!rxcb->is_continuation)
if (!is_continuation)
break;
}