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(parent: 320f1a4) | patch
ipv6: tcp: add rcu locking in tcp_v6_send_synack()
authorEric Dumazet <edumazet@google.com>
Fri, 8 Jan 2016 17:35:51 +0000 (09:35 -0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 11 Jan 2016 03:58:03 +0000 (22:58 -0500)
commit3e4006f0b86a5ae5eb0e8215f9a9e1db24506977
tree46041d98779ad4d94052a8460a5fa558a6e5e712tree | snapshot
parent320f1a4a175e7cd5d3f006f92b4d4d3e2cbb7bb5commit | diff
ipv6: tcp: add rcu locking in tcp_v6_send_synack()

When first SYNACK is sent, we already hold rcu_read_lock(), but this
is not true if a SYNACK is retransmitted, as a timer (soft) interrupt
does not hold rcu_read_lock()

Fixes: 45f6fad84cc30 ("ipv6: add complete rcu protection around np->opt")
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/tcp_ipv6.c diff | blob | history
Domain: System / Kernel; Licenses: GPL-2.0;