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Date: Sat, 16 May 2020 13:43:04 -0700 (PDT) From: David Miller <davem@...emloft.net> To: madhuparnabhowmik10@...il.com Cc: kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org, kuba@...nel.org, kaber@...sh.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, frextrite@...il.com, joel@...lfernandes.org, paulmck@...nel.org, cai@....pw, linux-kernel-mentees@...ts.linuxfoundation.org Subject: Re: [PATCH net v2] ipv6: Fix suspicious RCU usage warning in ip6mr From: madhuparnabhowmik10@...il.com Date: Sat, 16 May 2020 13:15:15 +0530 > From: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com> > > This patch fixes the following warning: > > ============================= > WARNING: suspicious RCU usage > 5.7.0-rc4-next-20200507-syzkaller #0 Not tainted > ----------------------------- > net/ipv6/ip6mr.c:124 RCU-list traversed in non-reader section!! > > ipmr_new_table() returns an existing table, but there is no table at > init. Therefore the condition: either holding rtnl or the list is empty > is used. > > Fixes: d1db275dd3f6e ("ipv6: ip6mr: support multiple tables") > Reported-by: kernel test robot <lkp@...el.com> > Suggested-by: Jakub Kicinski <kuba@...nel.org> > Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com> Applied and queued up for -stable, thanks.
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