udp: properly cope with csum errors

Dmitry reported that UDP sockets being destroyed would trigger the
WARN_ON(atomic_read(&sk->sk_rmem_alloc)); in inet_sock_destruct()

It turns out we do not properly destroy skb(s) that have wrong UDP
checksum.

Thanks again to syzkaller team.

Fixes : 7c13f97ffde6 ("udp: do fwd memory scheduling on dequeue")
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c

path: root/tools/lib/lockdep/tests/ABCDBDDA.c

#include <liblockdep/mutex.h>
#include "common.h"

void main(void)
{
	pthread_mutex_t a, b, c, d;

	pthread_mutex_init(&a, NULL);
	pthread_mutex_init(&b, NULL);
	pthread_mutex_init(&c, NULL);
	pthread_mutex_init(&d, NULL);

	LOCK_UNLOCK_2(a, b);
	LOCK_UNLOCK_2(c, d);
	LOCK_UNLOCK_2(b, d);
	LOCK_UNLOCK_2(d, a);
}