From: Vladimir Davydov <vdavydov@parallels.com>
To: <netdev@vger.kernel.org>
Subject: Possible deadlock in ipv6?
Date: Wed, 6 Jun 2012 18:49:24 +0400 [thread overview]
Message-ID: <4FCF6DF4.2090304@parallels.com> (raw)
I'm not familiar with the linux net subsystem, so I would appreciate if
someone could clarify if the following call chain is possible:
addrconf_ifdown() calls neigh_ifdown(nd_tbl) which locks nd_tbl.lock for
writing and calls
pneigh_ifdown
pndisc_destructor
ipv6_dev_mc_dec
__ipv6_dev_mc_dec
igmp6_group_dropped
igmp6_leave_group
igmp6_send
icmp6_dst_alloc
ip6_neigh_lookup
neigh_create
and neigh_create() locks nd_tbl.lock for writing again resulting in a
deadlock.
Thank you.
next reply other threads:[~2012-06-06 14:49 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-06 14:49 Vladimir Davydov [this message]
2012-06-06 15:53 ` Possible deadlock in ipv6? Eric Dumazet
2012-06-06 15:58 ` Eric Dumazet
2012-06-06 16:01 ` Vladimir Davydov
2012-06-06 17:02 ` Eric Dumazet
2012-06-12 6:54 ` David Miller
2012-06-12 9:09 ` Eric Dumazet
2012-06-21 4:05 ` David Miller
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