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Date: Wed, 23 Nov 2016 10:28:03 +0800
From: kernel test robot <xiaolong.ye@...el.com>
To: Mike Manning <mmanning@...cade.com>
Cc: netdev@...r.kernel.org, lkp@...org
Subject: [lkp] [net] 50d4a9ef15: INFO:suspicious_RCU_usage
FYI, we noticed the following commit:
commit 50d4a9ef15cee93344653f6ca8f9bab62e76e972 ("net: ipv6: avoid errors due to per-cpu atomic alloc")
url: https://github.com/0day-ci/linux/commits/Mike-Manning/net-ipv6-avoid-errors-due-to-per-cpu-atomic-alloc/20161122-202055
in testcase: trinity
with following parameters:
runtime: 300s
test-description: Trinity is a linux system call fuzz tester.
test-url: http://codemonkey.org.uk/projects/trinity/
on test machine: qemu-system-i386 -enable-kvm -m 320M
caused below changes:
+-----------------------------------------------------------------------------+------------+------------+
| | 3b404a5198 | 50d4a9ef15 |
+-----------------------------------------------------------------------------+------------+------------+
| boot_successes | 2 | 0 |
| boot_failures | 4 | 8 |
| calltrace:init | 4 | 8 |
| IP-Config:Auto-configuration_of_network_failed | 4 | 8 |
| INFO:suspicious_RCU_usage | 0 | 8 |
| calltrace:addrconf_notify | 0 | 8 |
| calltrace:ip_auto_config | 0 | 8 |
| WARNING:at_kernel/locking/mutex.c:#mutex_lock_nested | 0 | 8 |
| BUG:sleeping_function_called_from_invalid_context_at_kernel/locking/mutex.c | 0 | 1 |
| INFO:lockdep_is_turned_off | 0 | 1 |
| calltrace:SyS_ioctl | 0 | 1 |
+-----------------------------------------------------------------------------+------------+------------+
[ 20.158999] ### dt-test ### end of unittest - 149 passed, 0 failed
[ 20.170208]
[ 20.172448] ===============================
[ 20.178239] [ INFO: suspicious RCU usage. ]
[ 20.183917] 4.9.0-rc6-00087-g50d4a9e #1 Not tainted
[ 20.190554] -------------------------------
[ 20.196388] kernel/sched/core.c:7729 Illegal context switch in RCU-bh read-side critical section!
[ 20.210614]
[ 20.210614] other info that might help us debug this:
[ 20.210614]
[ 20.221405]
[ 20.221405] rcu_scheduler_active = 1, debug_locks = 1
[ 20.230284] 3 locks held by swapper/0/1:
[ 20.235791] #0:
[ 20.238261] (
rtnl_mutex
[ 20.242057] ){+.+.+.}
, at:
[ 20.246518] [<43f61b50>] rtnl_lock+0xf/0x11
[ 20.252294] #1:
[ 20.254819] (
rcu_read_lock_bh
[ 20.259422] ){......}
, at:
[ 20.263542] [<4401af1b>] ipv6_add_addr+0x47/0x43e
[ 20.270211] #2:
[ 20.272644] (
addrconf_hash_lock
[ 20.277542] ){+.....}
, at:
[ 20.281681] [<4401afaa>] ipv6_add_addr+0xd6/0x43e
[ 20.288459]
[ 20.288459] stack backtrace:
[ 20.294554] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-rc6-00087-g50d4a9e #1
[ 20.305143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 20.317757] 5344bc84 43bf3a0a 53450000 00000001 5344bca0 43aa5c4f 4441008b 4440e52f
[ 20.330680] 4440fa0e 0000026c 00000000 5344bcb4 43a896a6 53450000 00000000 00000000
[ 20.358226] 5344bcd0 43a89863 43b2b5c1 02080020 5344bcd4 4450ff80 4ffa5000 5344bd00
[ 20.367429] Call Trace:
[ 20.370671] [<43bf3a0a>] dump_stack+0x75/0xa9
[ 20.376473] [<43aa5c4f>] lockdep_rcu_suspicious+0xbb/0xc4
[ 20.383600] [<43a896a6>] ___might_sleep+0x82/0x1d2
[ 20.389988] [<43a89863>] __might_sleep+0x6d/0x74
[ 20.396177] [<43b2b5c1>] ? __slab_alloc+0x49/0x59
[ 20.404660] [<441541ee>] mutex_lock_nested+0x1e/0x2c5
[ 20.411304] [<43aa3263>] ? trace_hardirqs_on+0xb/0xd
[ 20.417850] [<43b14b56>] pcpu_alloc+0x84/0x42d
[ 20.423785] [<43f5a9a2>] ? dst_alloc+0x5f/0x6e
[ 20.429678] [<43b15308>] __alloc_percpu_gfp+0xb/0xd
[ 20.436133] [<44023f10>] ip6_dst_alloc+0x23/0x70
[ 20.442194] [<440265cf>] addrconf_dst_alloc+0x34/0xce
[ 20.448861] [<4401b02f>] ipv6_add_addr+0x15b/0x43e
[ 20.455188] [<4401eec6>] add_addr+0x19/0x5a
[ 20.460731] [<44020bf5>] addrconf_notify+0x565/0x93e
[ 20.467366] [<43f719a0>] ? pktgen_device_event+0x100/0x25c
[ 20.474501] [<43a7fd41>] notifier_call_chain+0x25/0x47
[ 20.481300] [<43a7fff4>] raw_notifier_call_chain+0xc/0xe
[ 20.488305] [<43f4ceef>] call_netdevice_notifiers_info+0x41/0x49
[ 20.496217] [<43f4ff3d>] call_netdevice_notifiers+0xc/0xe
[ 20.503271] [<43f53e20>] __dev_notify_flags+0x4a/0x74
[ 20.509920] [<43f543ab>] dev_change_flags+0x43/0x4b
[ 20.516371] [<445ec72b>] ip_auto_config+0xc0/0xddb
[ 20.522658] [<43aab38d>] ? vprintk_default+0x12/0x14
[ 20.529297] [<43fd20c5>] ? tcp_set_default_congestion_control+0x10/0x58
[ 20.537921] [<43fd2108>] ? tcp_set_default_congestion_control+0x53/0x58
[ 20.546538] [<44156fc9>] ? _raw_spin_unlock+0x1d/0x27
[ 20.553212] [<445ec66b>] ? root_nfs_parse_addr+0x8d/0x8d
[ 20.560246] [<445a7c29>] do_one_initcall+0x8b/0x11d
[ 20.585588] [<43a7e80c>] ? parse_args+0x198/0x26c
[ 20.592263] [<445a7da7>] kernel_init_freeable+0xec/0x174
[ 20.599324] [<4414fed1>] ? rest_init+0x111/0x111
[ 20.605448] [<4414fed9>] kernel_init+0x8/0xd0
[ 20.611253] [<44157503>] ret_from_fork+0x1b/0x28
[ 20.617704] ------------[ cut here ]------------
[ 20.623731] WARNING: CPU: 0 PID: 1 at kernel/locking/mutex.c:529 mutex_lock_nested+0x86/0x2c5
[ 20.637016] DEBUG_LOCKS_WARN_ON(in_interrupt())
[ 20.642915] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.9.0-rc6-00087-g50d4a9e #1
[ 20.652634] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 20.663948] 5344bc8c 43bf3a0a 5344bcb8 44154256 5344bca4 43a6a143 00000211 4450ff80
[ 20.675261] 53450000 00000000 5344bcc0 43a6a182 00000009 00000000 5344bcb8 44404245
[ 20.686568] 5344bcd4 5344bd00 44154256 4440fa0e 00000211 44404245 4440f9ff 43aa3263
[ 20.697838] Call Trace:
[ 20.701178] [<43bf3a0a>] dump_stack+0x75/0xa9
[ 20.724842] [<44154256>] ? mutex_lock_nested+0x86/0x2c5
[ 20.731774] [<43a6a143>] __warn+0xad/0xc4
[ 20.737146] [<43a6a182>] warn_slowpath_fmt+0x28/0x2d
[ 20.743729] [<44154256>] mutex_lock_nested+0x86/0x2c5
[ 20.750400] [<43aa3263>] ? trace_hardirqs_on+0xb/0xd
[ 20.756950] [<43b14b56>] pcpu_alloc+0x84/0x42d
[ 20.762878] [<43f5a9a2>] ? dst_alloc+0x5f/0x6e
[ 20.768744] [<43b15308>] __alloc_percpu_gfp+0xb/0xd
[ 20.775201] [<44023f10>] ip6_dst_alloc+0x23/0x70
[ 20.781388] [<440265cf>] addrconf_dst_alloc+0x34/0xce
[ 20.787994] [<4401b02f>] ipv6_add_addr+0x15b/0x43e
[ 20.794380] [<4401eec6>] add_addr+0x19/0x5a
[ 20.799984] [<44020bf5>] addrconf_notify+0x565/0x93e
[ 20.806598] [<43f719a0>] ? pktgen_device_event+0x100/0x25c
[ 20.813858] [<43a7fd41>] notifier_call_chain+0x25/0x47
[ 20.820633] [<43a7fff4>] raw_notifier_call_chain+0xc/0xe
[ 20.827629] [<43f4ceef>] call_netdevice_notifiers_info+0x41/0x49
[ 20.835598] [<43f4ff3d>] call_netdevice_notifiers+0xc/0xe
[ 20.842725] [<43f53e20>] __dev_notify_flags+0x4a/0x74
[ 20.849370] [<43f543ab>] dev_change_flags+0x43/0x4b
[ 20.855851] [<445ec72b>] ip_auto_config+0xc0/0xddb
[ 20.862271] [<43aab38d>] ? vprintk_default+0x12/0x14
[ 20.868812] [<43fd20c5>] ? tcp_set_default_congestion_control+0x10/0x58
[ 20.877495] [<43fd2108>] ? tcp_set_default_congestion_control+0x53/0x58
[ 20.886053] [<44156fc9>] ? _raw_spin_unlock+0x1d/0x27
[ 20.892791] [<445ec66b>] ? root_nfs_parse_addr+0x8d/0x8d
[ 20.899731] [<445a7c29>] do_one_initcall+0x8b/0x11d
[ 20.906240] [<43a7e80c>] ? parse_args+0x198/0x26c
[ 20.912468] [<445a7da7>] kernel_init_freeable+0xec/0x174
[ 20.919462] [<4414fed1>] ? rest_init+0x111/0x111
[ 20.925597] [<4414fed9>] kernel_init+0x8/0xd0
[ 20.931391] [<44157503>] ret_from_fork+0x1b/0x28
[ 20.937679] ---[ end trace 3474b18006c0c631 ]---
[ 20.944287] IP-Config: Failed to open ipddp0
[ 20.950711] usb0: eth_open
To reproduce:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
Thanks,
Xiaolong
View attachment "config-4.9.0-rc6-00087-g50d4a9e" of type "text/plain" (99182 bytes)
View attachment "job-script" of type "text/plain" (3589 bytes)
Download attachment "dmesg.xz" of type "application/octet-stream" (15816 bytes)
View attachment "job.yaml" of type "text/plain" (2810 bytes)
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