From: Willy Tarreau <w@1wt.eu>
To: Wei Wang <weiwan@google.com>
Cc: Martin KaFai Lau <kafai@fb.com>,
Eric Dumazet <edumazet@google.com>,
"David S. Miller" <davem@davemloft.net>,
Sasha Levin <alexander.levin@verizon.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Chris Rankin <rankincj@gmail.com>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: BUG warnings in 4.14.9
Date: Tue, 26 Dec 2017 19:59:55 +0100 [thread overview]
Message-ID: <20171226185955.GA19208@1wt.eu> (raw)
In-Reply-To: <CAK2bqV+NqMz0e-uVGREMvmmi_NgKRYyqZ8kd+yEfxT0pcCWE+g@mail.gmail.com>
Guys,
Chris reported the bug below and confirmed that reverting commit
9704f81 (ipv6: grab rt->rt6i_ref before allocating pcpu rt) seems to
have fixed the issue for him. This patch is a94b9367 in mainline.
I personally have no opinion on the patch, just found it because it
was the only one touching this area between 4.14.8 and 4.14.9 :-)
Should this be reverted or maybe fixed differently ?
thanks,
Willy
On Tue, Dec 26, 2017 at 01:49:59AM +0000, Chris Rankin wrote:
> Hi,
>
> I've just raised https://bugzilla.kernel.org/show_bug.cgi?id=198271
> because the new 4.14.9 kernel is generating lots of BUG warnings, e.g.
>
> [ 35.069924] BUG: using smp_processor_id() in preemptible [00000000]
> code: avahi-daemon/761
> [ 35.078187] caller is ip6_pol_route+0x46b/0x509 [ipv6]
> [ 35.083340] CPU: 5 PID: 761 Comm: avahi-daemon Tainted: G
> I 4.14.9 #1
> [ 35.091176] Hardware name: Gigabyte Technology Co., Ltd.
> EX58-UD3R/EX58-UD3R, BIOS FB 05/04/2009
> [ 35.100181] Call Trace:
> [ 35.102709] dump_stack+0x46/0x59
> [ 35.106095] check_preemption_disabled+0xca/0xda
> [ 35.110786] ip6_pol_route+0x46b/0x509 [ipv6]
> [ 35.115224] fib6_rule_lookup+0x15/0x4b [ipv6]
> [ 35.119745] ip6_dst_lookup_tail+0x11d/0x18f [ipv6]
> [ 35.124702] ip6_dst_lookup_flow+0x30/0x6f [ipv6]
> [ 35.129481] udpv6_sendmsg+0x5c5/0xa10 [ipv6]
> [ 35.133914] ? ip_reply_glue_bits+0x48/0x48
> [ 35.138187] ? rw_copy_check_uvector+0x6d/0xf9
> [ 35.142701] ? sock_sendmsg+0x28/0x34
> [ 35.146393] sock_sendmsg+0x28/0x34
> [ 35.149912] ___sys_sendmsg+0x1b4/0x246
> [ 35.153821] ? poll_select_copy_remaining+0x104/0x104
> [ 35.158995] ? current_time+0x11/0x52
> [ 35.162738] ? pipe_write+0x353/0x365
> [ 35.166483] ? __sys_sendmsg+0x3c/0x5d
> [ 35.170304] __sys_sendmsg+0x3c/0x5d
> [ 35.173909] do_syscall_64+0x4a/0xe1
> [ 35.177482] entry_SYSCALL64_slow_path+0x25/0x25
> [ 35.177484] RIP: 0033:0x7f963d7097b7
> [ 35.177485] RSP: 002b:00007ffff7ffbd18 EFLAGS: 00000246 ORIG_RAX:
> 000000000000002e
> [ 35.177486] RAX: ffffffffffffffda RBX: 000000000000000d RCX: 00007f963d7097b7
> [ 35.177487] RDX: 0000000000000000 RSI: 00007ffff7ffbde0 RDI: 000000000000000d
> [ 35.177487] RBP: 0000000000000000 R08: 0000000000000001 R09: 00007ffff7ffbd42
> [ 35.177488] R10: 0000000000000002 R11: 0000000000000246 R12: 00007ffff7ffbde0
> [ 35.177489] R13: 000055e4e1af29cc R14: 000000000000000d R15: 0000000000000002
> [ 35.177565] IN=eth0 OUT= MAC=
> SRC=fe80:0000:0000:0000:0224:1dff:fecd:0f3a
> DST=ff02:0000:0000:0000:0000:0000:0000:00fb LEN=245 TC=0 HOPLIMIT=255
> FLOWLBL=147873 PROTO=UDP SPT=5353 DPT=5353 LEN=205
>
> Cheers,
> Chris
next prev parent reply other threads:[~2017-12-26 19:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-26 1:49 BUG warnings in 4.14.9 Chris Rankin
2017-12-26 6:21 ` Willy Tarreau
2017-12-26 9:54 ` Chris Rankin
2017-12-26 18:59 ` Willy Tarreau [this message]
2017-12-26 20:54 ` Ido Schimmel
2017-12-27 4:25 ` alexander.levin
2017-12-27 12:57 ` Greg Kroah-Hartman
2017-12-26 23:08 ` alexander.levin
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