diff options
| author | Eric Dumazet <edumazet@google.com> | 2026-01-05 09:36:30 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-01-06 17:05:17 -0800 |
| commit | e5c8eda39a9fc1547d1398d707aa06c1d080abdd (patch) | |
| tree | ddaa6fb5b38f4d8b9d243e246b180fea088dce85 /net | |
| parent | 7801edc9badd972cb62cf11c0427e70b6dca239d (diff) | |
udp: call skb_orphan() before skb_attempt_defer_free()
Standard UDP receive path does not use skb->destructor.
But skmsg layer does use it, since it calls skb_set_owner_sk_safe()
from udp_read_skb().
This then triggers this warning in skb_attempt_defer_free():
DEBUG_NET_WARN_ON_ONCE(skb->destructor);
We must call skb_orphan() to fix this issue.
Fixes: 6471658dc66c ("udp: use skb_attempt_defer_free()")
Reported-by: syzbot+3e68572cf2286ce5ebe9@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/netdev/695b83bd.050a0220.1c9965.002b.GAE@google.com/T/#u
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260105093630.1976085-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/udp.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index ffe074cb5865..ee63af0ef42c 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1851,6 +1851,7 @@ void skb_consume_udp(struct sock *sk, struct sk_buff *skb, int len) sk_peek_offset_bwd(sk, len); if (!skb_shared(skb)) { + skb_orphan(skb); skb_attempt_defer_free(skb); return; } |