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authorEric Dumazet <edumazet@google.com>2017-02-03 14:59:38 -0800
committerDavid S. Miller <davem@davemloft.net>2017-02-06 22:38:55 -0500
commitccf7abb93af09ad0868ae9033d1ca8108bdaec82 (patch)
treea3d41e0f7a625bc45ea5396cfcf4a400284112cf /net/sctp/ipv6.c
parentb3f2d07f4649adcf6905953a10d217b5683e4077 (diff)
tcp: avoid infinite loop in tcp_splice_read()
Splicing from TCP socket is vulnerable when a packet with URG flag is received and stored into receive queue. __tcp_splice_read() returns 0, and sk_wait_data() immediately returns since there is the problematic skb in queue. This is a nice way to burn cpu (aka infinite loop) and trigger soft lockups. Again, this gem was found by syzkaller tool. Fixes: 9c55e01c0cc8 ("[TCP]: Splice receive support.") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Cc: Willy Tarreau <w@1wt.eu> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/ipv6.c')
0 files changed, 0 insertions, 0 deletions