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Date: Sat, 22 Aug 2015 05:30:02 +0800
From: kernel test robot <ying.huang@...el.com>
TO: Kees Cook <keescook@...omium.org>
CC: James Morris <james.l.morris@...cle.com>
Subject: [lkp] [Yama] 730daa164e7: INFO: suspicious RCU usage. ]
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 730daa164e7c7e31c08fab940549f4acc3329432 ("Yama: remove needless CONFIG_SECURITY_YAMA_STACKED")
+------------------------------------------------+------------+------------+
| | fe6c59dc17 | 730daa164e |
+------------------------------------------------+------------+------------+
| boot_successes | 21 | 0 |
| boot_failures | 10 | 21 |
| IP-Config:Auto-configuration_of_network_failed | 10 | 10 |
| INFO:suspicious_RCU_usage | 0 | 21 |
| backtrace:inet_ctl_sock_create | 0 | 21 |
| backtrace:dccp_v4_init_net | 0 | 21 |
| backtrace:ops_init | 0 | 21 |
| backtrace:register_pernet_subsys | 0 | 21 |
| backtrace:dccp_v4_init | 0 | 21 |
| backtrace:kernel_init_freeable | 0 | 21 |
+------------------------------------------------+------------+------------+
[ 3.532320] ===============================
[ 3.532320] ===============================
[ 3.532958] [ INFO: suspicious RCU usage. ]
[ 3.532958] [ INFO: suspicious RCU usage. ]
[ 3.533598] 4.2.0-rc3-00005-g730daa1 #2 Not tainted
[ 3.533598] 4.2.0-rc3-00005-g730daa1 #2 Not tainted
[ 3.534347] -------------------------------
[ 3.534347] -------------------------------
[ 3.534964] net/ipv4/cipso_ipv4.c:1936 suspicious rcu_dereference_protected() usage!
[ 3.534964] net/ipv4/cipso_ipv4.c:1936 suspicious rcu_dereference_protected() usage!
[ 3.536386]
[ 3.536386] other info that might help us debug this:
[ 3.536386]
[ 3.536386]
[ 3.536386] other info that might help us debug this:
[ 3.536386]
[ 3.537593]
[ 3.537593] rcu_scheduler_active = 1, debug_locks = 0
[ 3.537593]
[ 3.537593] rcu_scheduler_active = 1, debug_locks = 0
[ 3.538550] 3 locks held by swapper/1:
[ 3.538550] 3 locks held by swapper/1:
[ 3.539131] #0:
[ 3.539131] #0: ( (net_mutexnet_mutex){+.+.+.}){+.+.+.}, at: , at: [<412e3d44>] register_pernet_subsys+0x17/0x2f
[<412e3d44>] register_pernet_subsys+0x17/0x2f
[ 3.540430] #1:
[ 3.540430] #1: ( (slock-AF_INETslock-AF_INET/1/1){+.....}){+.....}, at: , at: [<4116c83d>] smack_netlabel+0x37/0x81
[<4116c83d>] smack_netlabel+0x37/0x81
[ 3.541659] #2:
[ 3.541659] #2: ( (rcu_read_lockrcu_read_lock){......}){......}, at: , at: [<413adb4a>] rcu_read_lock+0x0/0x5d
[<413adb4a>] rcu_read_lock+0x0/0x5d
[ 3.542841]
[ 3.542841] stack backtrace:
[ 3.542841]
[ 3.542841] stack backtrace:
[ 3.543506] CPU: 0 PID: 1 Comm: swapper Not tainted 4.2.0-rc3-00005-g730daa1 #2
[ 3.543506] CPU: 0 PID: 1 Comm: swapper Not tainted 4.2.0-rc3-00005-g730daa1 #2
[ 3.544585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 3.544585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[ 3.546106] 00000000
[ 3.546106] 00000000 00000001 00000001 4005fddc 4005fddc 413c5dcc 413c5dcc 4005fdf8 4005fdf8 410694c2 410694c2 4158ab66 4158ab66 4005c040 4005c040
[ 3.547340] 4c3f9740
[ 3.547340] 4c3f9740 519ae1cb 519ae1cb 519ae180 519ae180 4005fe1c 4005fe1c 41364911 41364911 0000000b 0000000b 0000000c 0000000c 519ae1c0 519ae1c0
[ 3.548571] 519ae180
[ 3.548571] 519ae180 ffffffa7 ffffffa7 4f34f660 4f34f660 4c3f9740 4c3f9740 4005fe34 4005fe34 413ae46d 413ae46d 417aa958 417aa958 4c3f9740 4c3f9740
[ 3.549853] Call Trace:
[ 3.549853] Call Trace:
[ 3.550244] [<413c5dcc>] dump_stack+0x16/0x18
[ 3.550244] [<413c5dcc>] dump_stack+0x16/0x18
[ 3.550925] [<410694c2>] lockdep_rcu_suspicious+0xc4/0xcd
[ 3.550925] [<410694c2>] lockdep_rcu_suspicious+0xc4/0xcd
[ 3.551835] [<41364911>] cipso_v4_sock_setattr+0xc4/0x13c
[ 3.551835] [<41364911>] cipso_v4_sock_setattr+0xc4/0x13c
[ 3.552717] [<413ae46d>] netlbl_sock_setattr+0x65/0x7b
[ 3.552717] [<413ae46d>] netlbl_sock_setattr+0x65/0x7b
[ 3.553508] [<4116c867>] smack_netlabel+0x61/0x81
[ 3.553508] [<4116c867>] smack_netlabel+0x61/0x81
[ 3.554212] [<4116c8e9>] smack_socket_post_create+0x62/0x67
[ 3.554212] [<4116c8e9>] smack_socket_post_create+0x62/0x67
[ 3.555088] [<4116b1c2>] security_socket_post_create+0x31/0x45
[ 3.555088] [<4116b1c2>] security_socket_post_create+0x31/0x45
[ 3.555958] [<412d6313>] __sock_create+0x18a/0x1a3
[ 3.555958] [<412d6313>] __sock_create+0x18a/0x1a3
[ 3.556710] [<412d6634>] sock_create_kern+0x15/0x17
[ 3.556710] [<412d6634>] sock_create_kern+0x15/0x17
[ 3.557451] [<41351b71>] inet_ctl_sock_create+0x24/0x4f
[ 3.557451] [<41351b71>] inet_ctl_sock_create+0x24/0x4f
[ 3.558259] [<4185d98c>] dccp_v4_init_net+0x26/0x30
[ 3.558259] [<4185d98c>] dccp_v4_init_net+0x26/0x30
[ 3.558992] [<412e3c7f>] ops_init+0x129/0x14f
[ 3.558992] [<412e3c7f>] ops_init+0x129/0x14f
[ 3.559844] [<410422f2>] ? __local_bh_enable_ip+0x10f/0x116
[ 3.559844] [<410422f2>] ? __local_bh_enable_ip+0x10f/0x116
[ 3.560709] [<412e3d00>] register_pernet_operations+0x5b/0x88
[ 3.560709] [<412e3d00>] register_pernet_operations+0x5b/0x88
[ 3.561702] [<4185d996>] ? dccp_v4_init_net+0x30/0x30
[ 3.561702] [<4185d996>] ? dccp_v4_init_net+0x30/0x30
[ 3.562462] [<412e3d4b>] register_pernet_subsys+0x1e/0x2f
[ 3.562462] [<412e3d4b>] register_pernet_subsys+0x1e/0x2f
[ 3.563294] [<4185d9d8>] dccp_v4_init+0x42/0x70
[ 3.563294] [<4185d9d8>] dccp_v4_init+0x42/0x70
[ 3.563994] [<4100053f>] do_one_initcall+0x18b/0x19a
[ 3.563994] [<4100053f>] do_one_initcall+0x18b/0x19a
[ 3.564791] [<41822472>] ? repair_env_string+0x12/0x54
[ 3.564791] [<41822472>] ? repair_env_string+0x12/0x54
[ 3.565595] [<41056ba7>] ? parse_args+0x191/0x26f
[ 3.565595] [<41056ba7>] ? parse_args+0x191/0x26f
[ 3.566326] [<41822cea>] kernel_init_freeable+0x18d/0x205
[ 3.566326] [<41822cea>] kernel_init_freeable+0x18d/0x205
[ 3.567180] [<413c2731>] kernel_init+0xd/0xb5
[ 3.567180] [<413c2731>] kernel_init+0xd/0xb5
[ 3.567845] [<413cbf40>] ret_from_kernel_thread+0x20/0x30
[ 3.567845] [<413cbf40>] ret_from_kernel_thread+0x20/0x30
[ 3.568652] [<413c2724>] ? rest_init+0x113/0x113
[ 3.568652] [<413c2724>] ? rest_init+0x113/0x113
Thanks,
Ying Huang
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