From e2eb8d452827b8d1f73db384cd7c6482eac29478 Mon Sep 17 00:00:00 2001 From: Jarek Poplawski Date: Thu, 8 Mar 2007 14:43:41 -0800 Subject: [PATCH] [SCTP] ipv6: inconsistent lock state ipv6_add_addr/sctp_v6_copy_addrlist lockdep found that dev->lock taken from softirq in ipv6_add_addr is also taken in sctp_v6_copy_addrlist with softirqs enabled, so lockup is possible. Noticed-by: Simon Arlott Signed-off-by: Jarek Poplawski Signed-off-by: David S. Miller --- net/sctp/ipv6.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index 63fe1093b6..0b9c49b3a1 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -360,7 +360,7 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist, return; } - read_lock(&in6_dev->lock); + read_lock_bh(&in6_dev->lock); for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) { /* Add the address to the local list. */ addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); @@ -374,7 +374,7 @@ static void sctp_v6_copy_addrlist(struct list_head *addrlist, } } - read_unlock(&in6_dev->lock); + read_unlock_bh(&in6_dev->lock); rcu_read_unlock(); } -- 2.20.1