From: Jakub Kicinski <kuba@xxxxxxxxxx>
[ Upstream commit b3a03b540e3cf62a255213d084d76d71c02793d5 ]
skb->len covers the entire skb, including the frag_list.
In fact we're guaranteed that rxm->full_len <= skb->len,
so since the change under Fixes we were not checking decrypt
status of any skb but the first.
Note that the skb_pagelen() added here may feel a bit costly,
but it's removed by subsequent fixes, anyway.
Reported-by: Tariq Toukan <tariqt@xxxxxxxxxx>
Fixes: 86b259f6f888 ("tls: rx: device: bound the frag walk")
Tested-by: Shai Amiram <samiram@xxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/tls/tls_device.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index a7cc4f9faac28..3b87c7b04ac87 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -1012,7 +1012,7 @@ int tls_device_decrypted(struct sock *sk, struct tls_context *tls_ctx)
struct sk_buff *skb_iter;
int left;
- left = rxm->full_len - skb->len;
+ left = rxm->full_len + rxm->offset - skb_pagelen(skb);
/* Check if all the data is decrypted already */
skb_iter = skb_shinfo(skb)->frag_list;
while (skb_iter && left > 0) {
--
2.39.2
