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In commits93821778de("udp: Fix rcv socket locking") andf7ad74fef3("net/ipv6/udp: UDP encapsulation: break backlog_rcv into __udpv6_queue_rcv_skb") UDP backlog handlers were renamed, but UDPlite was forgotten. This leads to crashes if UDPlite header is pulled twice, which happens starting from commite6afc8ace6("udp: remove headers from UDP packets before queueing") Bug found by syzkaller team, thanks a lot guys ! Note that backlog use in UDP/UDPlite is scheduled to be removed starting from linux-4.10, so this patch is only needed up to linux-4.9 Fixes:93821778de("udp: Fix rcv socket locking") Fixes:f7ad74fef3("net/ipv6/udp: UDP encapsulation: break backlog_rcv into __udpv6_queue_rcv_skb") Fixes:e6afc8ace6("udp: remove headers from UDP packets before queueing") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Andrey Konovalov <andreyknvl@google.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
#ifndef _UDP4_IMPL_H
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#define _UDP4_IMPL_H
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#include <net/udp.h>
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#include <net/udplite.h>
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#include <net/protocol.h>
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#include <net/inet_common.h>
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int __udp4_lib_rcv(struct sk_buff *, struct udp_table *, int);
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void __udp4_lib_err(struct sk_buff *, u32, struct udp_table *);
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int udp_v4_get_port(struct sock *sk, unsigned short snum);
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int udp_setsockopt(struct sock *sk, int level, int optname,
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char __user *optval, unsigned int optlen);
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int udp_getsockopt(struct sock *sk, int level, int optname,
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char __user *optval, int __user *optlen);
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#ifdef CONFIG_COMPAT
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int compat_udp_setsockopt(struct sock *sk, int level, int optname,
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char __user *optval, unsigned int optlen);
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int compat_udp_getsockopt(struct sock *sk, int level, int optname,
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char __user *optval, int __user *optlen);
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#endif
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int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
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int flags, int *addr_len);
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int udp_sendpage(struct sock *sk, struct page *page, int offset, size_t size,
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int flags);
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int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
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void udp_destroy_sock(struct sock *sk);
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#ifdef CONFIG_PROC_FS
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int udp4_seq_show(struct seq_file *seq, void *v);
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#endif
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#endif /* _UDP4_IMPL_H */
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