mirror of
https://github.com/brain-hackers/linux-brain.git
synced 2024-06-09 15:26:21 +09:00
net: udp: fix UDP header access on Fast/frag0 UDP GRO
[ Upstream commit 4b1a86281cc1d0de46df3ad2cb8c1f86ac07681c ]
UDP GRO uses udp_hdr(skb) in its .gro_receive() callback. While it's
probably OK for non-frag0 paths (when all headers or even the entire
frame are already in skb head), this inline points to junk when
using Fast GRO (napi_gro_frags() or napi_gro_receive() with only
Ethernet header in skb head and all the rest in the frags) and breaks
GRO packet compilation and the packet flow itself.
To support both modes, skb_gro_header_fast() + skb_gro_header_slow()
are typically used. UDP even has an inline helper that makes use of
them, udp_gro_udphdr(). Use that instead of troublemaking udp_hdr()
to get rid of the out-of-order delivers.
Present since the introduction of plain UDP GRO in 5.0-rc1.
Fixes: e20cf8d3f1
("udp: implement GRO for plain UDP sockets.")
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
016e70d176
commit
25786fb512
|
@ -349,7 +349,7 @@ static struct sk_buff *udp4_ufo_fragment(struct sk_buff *skb,
|
|||
static struct sk_buff *udp_gro_receive_segment(struct list_head *head,
|
||||
struct sk_buff *skb)
|
||||
{
|
||||
struct udphdr *uh = udp_hdr(skb);
|
||||
struct udphdr *uh = udp_gro_udphdr(skb);
|
||||
struct sk_buff *pp = NULL;
|
||||
struct udphdr *uh2;
|
||||
struct sk_buff *p;
|
||||
|
|
Loading…
Reference in New Issue
Block a user