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Message-ID: <CA+G9fYvWCf4fYuQsVLu0NdN+=W73bW1hr1hiokajktNzPFyYtA@mail.gmail.com>
Date: Tue, 10 Oct 2023 02:13:30 +0530
From: Naresh Kamboju <naresh.kamboju@...aro.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev,
linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org, linux@...ck-us.net, shuah@...nel.org,
patches@...nelci.org, lkft-triage@...ts.linaro.org, pavel@...x.de,
jonathanh@...dia.com, f.fainelli@...il.com,
sudipm.mukherjee@...il.com, srw@...dewatkins.net, rwarsow@....de,
conor@...nel.org, "David S. Miller" <davem@...emloft.net>,
David Ahern <dsahern@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Netdev <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
MPTCP Upstream <mptcp@...ts.linux.dev>
Subject: Re: [PATCH 6.1 000/162] 6.1.57-rc1 review
On Mon, 9 Oct 2023 at 18:46, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> This is the start of the stable review cycle for the 6.1.57 release.
> There are 162 patches in this series, all will be posted as a response
> to this one. If anyone has any issues with these being applied, please
> let me know.
>
> Responses should be made by Wed, 11 Oct 2023 13:00:55 +0000.
> Anything received after that time might be too late.
>
> The whole patch series can be found in one patch at:
> https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.1.57-rc1.gz
> or in the git tree and branch at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.1.y
> and the diffstat can be found below.
>
> thanks,
>
> greg k-h
The following kernel warnings were noticed several times on arm x15 devices
running stable-rc 6.1.57-rc1 while running selftests: net: mptcp_connect.sh
and netfilter: nft_fib.sh.
The possible unsafe locking scenario detected.
FYI,
Stable-rc/ linux.6.1.y kernel running stable/ linux.6.5.y selftest in this case.
Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
kselftest: Running tests in net/mptcp
TAP version 13
1..7
# timeout set to 1200
# selftests: net/mptcp: mptcp_connect.sh
[ 80.093261] IPv6: ADDRCONF(NETDEV_CHANGE): ns1eth2: link becomes ready
[ 80.449707] IPv6: ADDRCONF(NETDEV_CHANGE): ns2eth3: link becomes ready
[ 80.770538] IPv6: ADDRCONF(NETDEV_CHANGE): ns2eth1: link becomes ready
[ 80.826141] IPv6: ADDRCONF(NETDEV_CHANGE): ns4eth3: link becomes ready
[ 80.833465] IPv6: ADDRCONF(NETDEV_CHANGE): ns3eth4: link becomes ready
# INFO: set ns4-64ac7c08-UbLqmM dev ns4eth3: ethtool -K gso off
# Created /tmp/tmp.de3ILrgEEm (size 375836 /tmp/tmp.de3ILrgEEm)
containing data sent by client
# Created /tmp/tmp.YGH83JN29o (size 8315932 /tmp/tmp.YGH83JN29o)
containing data sent by server
# New MPTCP socket can be blocked via sysctl [ OK ]
# INFO: validating network environment with pings
[ 82.468353]
[ 82.469848] ================================
[ 82.474151] WARNING: inconsistent lock state
[ 82.478454] 6.1.57-rc1 #1 Not tainted
[ 82.482116] --------------------------------
[ 82.486419] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-R} usage.
[ 82.492431] ping/1924 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 82.497436] c9a58224 (&n->lock){++-?}-{2:2}, at: rt6_score_route+0xd8/0x1e0
[ 82.504455] {IN-SOFTIRQ-W} state was registered at:
[ 82.509368] _raw_write_lock_bh+0x48/0x58
[ 82.513488] __neigh_update+0x74/0xe48
[ 82.517333] neigh_update+0x24/0x2c
[ 82.520935] ndisc_rcv+0x4c4/0x1440
[ 82.524536] icmpv6_rcv+0x604/0x810
[ 82.528137] ip6_protocol_deliver_rcu+0x9c/0x9ac
[ 82.532867] ip6_input_finish+0xa0/0x18c
[ 82.536895] ip6_mc_input+0x148/0x3d0
[ 82.540679] __netif_receive_skb_one_core+0x58/0x74
[ 82.545654] process_backlog+0x138/0x300
[ 82.549713] __napi_poll+0x34/0x258
[ 82.553283] net_rx_action+0x160/0x350
[ 82.557159] __do_softirq+0x1b8/0x4dc
[ 82.560913] call_with_stack+0x18/0x20
[ 82.564788] do_softirq+0xb0/0xb4
[ 82.568206] __local_bh_enable_ip+0x180/0x1b8
[ 82.572662] __dev_queue_xmit+0x3bc/0x12d0
[ 82.576873] ip6_finish_output2+0x178/0xb80
[ 82.581176] ip6_finish_output+0x1c8/0x48c
[ 82.585388] ndisc_send_skb+0x4d8/0x8c0
[ 82.589324] addrconf_dad_completed+0xd8/0x3b0
[ 82.593872] addrconf_dad_work+0x208/0x56c
[ 82.598083] process_one_work+0x26c/0x6a0
[ 82.602203] worker_thread+0x60/0x4e8
[ 82.605987] kthread+0xfc/0x11c
[ 82.609222] ret_from_fork+0x14/0x28
[ 82.612915] irq event stamp: 18041
[ 82.616333] hardirqs last enabled at (18041): [<c035a990>]
__local_bh_enable_ip+0xcc/0x1b8
[ 82.624725] hardirqs last disabled at (18039): [<c035aa0c>]
__local_bh_enable_ip+0x148/0x1b8
[ 82.633178] softirqs last enabled at (18040): [<c14fc510>]
ip6_datagram_connect+0x20/0x44
[ 82.641510] softirqs last disabled at (18038): [<c1306cc8>]
lock_sock_nested+0x4c/0x7c
[ 82.649475]
[ 82.649475] other info that might help us debug this:
[ 82.656036] Possible unsafe locking scenario:
[ 82.656036]
[ 82.661956] CPU0
[ 82.664428] ----
[ 82.666870] lock(&n->lock);
[ 82.669860] <Interrupt>
[ 82.672485] lock(&n->lock);
[ 82.675659]
[ 82.675659] *** DEADLOCK ***
[ 82.675659]
[ 82.681610] 4 locks held by ping/1924:
[ 82.685363] #0: c9ab0110 (sk_lock-AF_INET6){+.+.}-{0:0}, at:
ip6_datagram_connect+0x20/0x44
[ 82.693878] #1: c24a62f8 (rcu_read_lock){....}-{1:2}, at:
ip6_route_output_flags+0x0/0x1f4
[ 82.702301] #2: c24a62f8 (rcu_read_lock){....}-{1:2}, at:
ip6_pol_route+0x60/0x718
[ 82.709991] #3: c24a62f8 (rcu_read_lock){....}-{1:2}, at:
rt6_score_route+0x78/0x1e0
[ 82.717895]
[ 82.717895] stack backtrace:
[ 82.722259] CPU: 1 PID: 1924 Comm: ping Not tainted 6.1.57-rc1 #1
[ 82.728393] Hardware name: Generic DRA74X (Flattened Device Tree)
[ 82.734527] unwind_backtrace from show_stack+0x18/0x1c
[ 82.739776] show_stack from dump_stack_lvl+0x58/0x70
[ 82.744873] dump_stack_lvl from mark_lock.part.0+0xb74/0x128c
[ 82.750732] mark_lock.part.0 from __lock_acquire+0x3d8/0x2aa4
[ 82.756591] __lock_acquire from lock_acquire+0x110/0x334
[ 82.762023] lock_acquire from _raw_read_lock+0x64/0x74
[ 82.767272] _raw_read_lock from rt6_score_route+0xd8/0x1e0
[ 82.772888] rt6_score_route from find_match.part.0+0x6c/0x4d4
[ 82.778747] find_match.part.0 from __find_rr_leaf+0xb8/0x430
[ 82.784515] __find_rr_leaf from fib6_table_lookup+0x234/0x46c
[ 82.790405] fib6_table_lookup from ip6_pol_route+0xd0/0x718
[ 82.796081] ip6_pol_route from ip6_pol_route_output+0x2c/0x34
[ 82.801940] ip6_pol_route_output from fib6_rule_lookup+0xb4/0x1e4
[ 82.808166] fib6_rule_lookup from ip6_route_output_flags_noref+0xbc/0x110
[ 82.815063] ip6_route_output_flags_noref from
ip6_route_output_flags+0x78/0x1f4
[ 82.822509] ip6_route_output_flags from ip6_dst_lookup_tail+0xa8/0x7b0
[ 82.829162] ip6_dst_lookup_tail from ip6_dst_lookup_flow+0x40/0x90
[ 82.835479] ip6_dst_lookup_flow from ip6_datagram_dst_update+0x18c/0x3d4
[ 82.842315] ip6_datagram_dst_update from __ip6_datagram_connect+0x234/0x4b0
[ 82.849395] __ip6_datagram_connect from ip6_datagram_connect+0x30/0x44
[ 82.856048] ip6_datagram_connect from __sys_connect+0xc4/0xd8
[ 82.861907] __sys_connect from ret_fast_syscall+0x0/0x1c
[ 82.867340] Exception stack(0xf0441fa8 to 0xf0441ff0)
[ 82.872436] 1fa0: 004e2208 004e0208 00000006
004e2524 0000001c 00000001
[ 82.880645] 1fc0: 004e2208 004e0208 bec08828 0000011b 004e3544
00000000 00000006 00000000
[ 82.888854] 1fe0: 0000011b bec08778 b6efe83b b6e67616
# INFO: Using loss of 0.16% delay 24 ms reorder 96% 19% with delay 6ms
on ns3eth4
...
# ns1 TCP -> ns1 (dead:beef:1::1:10053) MPTCP (duration 242ms) [ OK ]
# INFO: TFO not supported by the kernel: SKIP
# INFO: test tproxy ipv4
# ns1 MPTCP -> ns2 (10.0.3.1:20000 ) MPTCP (duration 412ms) [ OK ]
# PASS: tproxy ipv4
# INFO: test tproxy ipv6
# ns1 MPTCP -> ns2 (dead:beef:3::1:20000) MPTCP (duration 323ms) [ OK ]
# PASS: tproxy ipv6
# INFO: disconnect
# ns1 MPTCP -> ns1 (10.0.1.1:20001 ) MPTCP (duration 198ms) [ OK ]
# ns1 MPTCP -> ns1 (10.0.1.1:20002 ) TCP (duration 91ms) [ OK ]
# ns1 TCP -> ns1 (10.0.1.1:20003 ) MPTCP (duration 88ms) [ OK ]
# ns1 MPTCP -> ns1 (dead:beef:1::1:20004) MPTCP (duration 147ms) [ OK ]
# ns1 MPTCP -> ns1 (dead:beef:1::1:20005) TCP (duration 95ms) [ OK ]
# ns1 TCP -> ns1 (dead:beef:1::1:20006) MPTCP (duration 83ms) [ OK ]
# Time: 88 seconds
ok 1 selftests: net/mptcp: mptcp_connect.sh
And on other instance,
[ 77.366607] kselftest: Running tests in netfilter
TAP version 13
1..14
# timeout set to 120
# selftests: netfilter: nft_fib.sh
# /dev/stdin:4:10-28: Error: Could not process rule: No such file or directory
# fib saddr . iif oif missing counter log prefix
\"nsrouter-TgCmRmhz nft_rpfilter: \" drop
# ^^^^^^^^^^^^^^^^^^^
# /dev/stdin:4:10-28: Error: Could not process rule: No such file or directory
# fib saddr . iif oif missing counter log prefix
\"ns1-TgCmRmhz nft_rpfilter: \" drop
# ^^^^^^^^^^^^^^^^^^^
# /dev/stdin:4:10-28: Error: Could not process rule: No such file or directory
# fib saddr . iif oif missing counter log prefix
\"ns2-TgCmRmhz nft_rpfilter: \" drop
# ^^^^^^^^^^^^^^^^^^^
[ 79.492797] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 79.567138] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[ 80.175903] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 84.184631]
[ 84.186157] ================================
[ 84.190429] WARNING: inconsistent lock state
[ 84.194732] 6.1.57-rc1 #1 Not tainted
[ 84.198425] --------------------------------
[ 84.202697] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-R} usage.
[ 84.208740] ping/582 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 84.213653] c85b0e24 (&n->lock){++-?}-{2:2}, at: rt6_score_route+0xd8/0x1e0
[ 84.220703] {IN-SOFTIRQ-W} state was registered at:
[ 84.225616] _raw_write_lock_bh+0x48/0x58
[ 84.229736] __neigh_update+0x74/0xe48
[ 84.233612] neigh_update+0x24/0x2c
[ 84.237213] ndisc_rcv+0x4c4/0x1440
[ 84.240814] icmpv6_rcv+0x604/0x810
[ 84.244415] ip6_protocol_deliver_rcu+0x9c/0x9ac
[ 84.249145] ip6_input_finish+0xa0/0x18c
[ 84.253204] ip6_mc_input+0x148/0x3d0
[ 84.256958] __netif_receive_skb_one_core+0x58/0x74
[ 84.261962] process_backlog+0x138/0x300
[ 84.266021] __napi_poll+0x34/0x258
[ 84.269622] net_rx_action+0x160/0x350
[ 84.273468] __do_softirq+0x1b8/0x4dc
[ 84.277252] call_with_stack+0x18/0x20
[ 84.281127] do_softirq+0xb0/0xb4
[ 84.284545] __local_bh_enable_ip+0x180/0x1b8
[ 84.289001] __dev_queue_xmit+0x3bc/0x12d0
[ 84.293212] ip6_finish_output2+0x178/0xb80
[ 84.297515] ip6_finish_output+0x1c8/0x48c
[ 84.301727] ndisc_send_skb+0x4d8/0x8c0
[ 84.305694] addrconf_dad_completed+0xd8/0x3b0
[ 84.310241] addrconf_dad_work+0x208/0x56c
[ 84.314453] process_one_work+0x26c/0x6a0
[ 84.318572] worker_thread+0x60/0x4e8
[ 84.322357] kthread+0xfc/0x11c
[ 84.325622] ret_from_fork+0x14/0x28
[ 84.329315] irq event stamp: 18409
[ 84.332733] hardirqs last enabled at (18409): [<c0422f9c>]
ktime_get_real_ts64+0x208/0x22c
[ 84.341125] hardirqs last disabled at (18408): [<c0422f68>]
ktime_get_real_ts64+0x1d4/0x22c
[ 84.349517] softirqs last enabled at (18368): [<c14e08a8>]
rawv6_sendmsg+0x780/0x14cc
[ 84.357482] softirqs last disabled at (18366): [<c1306ea0>]
release_sock+0x20/0xa0
[ 84.365112]
[ 84.365112] other info that might help us debug this:
[ 84.371673] Possible unsafe locking scenario:
[ 84.371673]
[ 84.377624] CPU0
[ 84.380096] ----
[ 84.382537] lock(&n->lock);
[ 84.385528] <Interrupt>
[ 84.388183] lock(&n->lock);
[ 84.391326]
[ 84.391326] *** DEADLOCK ***
[ 84.391326]
[ 84.397277] 3 locks held by ping/582:
[ 84.400970] #0: c24a62f8 (rcu_read_lock){....}-{1:2}, at:
ip6_route_output_flags+0x0/0x1f4
[ 84.409393] #1: c24a62f8 (rcu_read_lock){....}-{1:2}, at:
ip6_pol_route+0x60/0x718
[ 84.417114] #2: c24a62f8 (rcu_read_lock){....}-{1:2}, at:
rt6_score_route+0x78/0x1e0
[ 84.425048]
[ 84.425048] stack backtrace:
[ 84.429412] CPU: 0 PID: 582 Comm: ping Not tainted 6.1.57-rc1 #1
[ 84.435455] Hardware name: Generic DRA74X (Flattened Device Tree)
[ 84.441589] unwind_backtrace from show_stack+0x18/0x1c
[ 84.446868] show_stack from dump_stack_lvl+0x58/0x70
[ 84.451965] dump_stack_lvl from mark_lock.part.0+0xb74/0x128c
[ 84.457824] mark_lock.part.0 from __lock_acquire+0x3d8/0x2aa4
[ 84.463684] __lock_acquire from lock_acquire+0x110/0x334
[ 84.469116] lock_acquire from _raw_read_lock+0x64/0x74
[ 84.474395] _raw_read_lock from rt6_score_route+0xd8/0x1e0
[ 84.480010] rt6_score_route from find_match.part.0+0x6c/0x4d4
[ 84.485900] find_match.part.0 from __find_rr_leaf+0xb8/0x430
[ 84.491668] __find_rr_leaf from fib6_table_lookup+0x234/0x46c
[ 84.497528] fib6_table_lookup from ip6_pol_route+0xd0/0x718
[ 84.503234] ip6_pol_route from ip6_pol_route_output+0x2c/0x34
[ 84.509094] ip6_pol_route_output from fib6_rule_lookup+0xb4/0x1e4
[ 84.515319] fib6_rule_lookup from ip6_route_output_flags_noref+0xbc/0x110
[ 84.522247] ip6_route_output_flags_noref from
ip6_route_output_flags+0x78/0x1f4
[ 84.529693] ip6_route_output_flags from ip6_dst_lookup_tail+0xa8/0x7b0
[ 84.536346] ip6_dst_lookup_tail from ip6_dst_lookup_flow+0x40/0x90
[ 84.542663] ip6_dst_lookup_flow from rawv6_sendmsg+0x3d0/0x14cc
[ 84.548736] rawv6_sendmsg from __sys_sendto+0xd8/0x128
[ 84.553985] __sys_sendto from ret_fast_syscall+0x0/0x1c
[ 84.559326] Exception stack(0xf03e1fa8 to 0xf03e1ff0)
[ 84.564422] 1fa0: 004b247c 0000001c 00000006
004b5220 00000040 00000800
[ 84.572662] 1fc0: 004b247c 0000001c 00000001 00000122 004b5220
004b3208 004b0208 beb36778
[ 84.580871] 1fe0: 00000122 beb36608 b6e8ed91 b6df7616
# PASS: fib expression did not cause unwanted packet drops
Links,
- https://lkft.validation.linaro.org/scheduler/job/6858069#L4022
- https://lkft.validation.linaro.org/scheduler/job/6857530#L3070
- https://lkft.validation.linaro.org/scheduler/job/6856378#L3074
metadata:
git_ref: linux-6.1.y
git_repo: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
git_sha: 282079f8e40746cc342a7dd12654e3af7de01823
git_describe: v6.1.56-163-g282079f8e407
kernel_version: 6.1.57-rc1
kernel-config:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2WWpUEO5ikJpR8NnchDG1NClaGf/config
artifact-location:
https://storage.tuxsuite.com/public/linaro/lkft/builds/2WWpUEO5ikJpR8NnchDG1NClaGf/
toolchain: gcc-10
--
Linaro LKFT
https://lkft.linaro.org
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