syzbot


INFO: task hung in dev_deactivate_many

Status: auto-closed as invalid on 2019/09/07 05:02
Reported-by: syzbot+9d66da9b2acf11edf3f4@syzkaller.appspotmail.com
First crash: 1927d, last: 1927d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in dev_deactivate_many (2) net 13 1759d 1944d 0/27 closed as invalid on 2019/10/23 07:54
upstream INFO: task hung in dev_deactivate_many net syz 8 2005d 2099d 0/27 closed as invalid on 2019/02/22 11:37

Sample crash report:
ip6_tunnel: l0 xmit: Local address not yet configured!
INFO: task kworker/u4:23:7567 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:23   D26352  7567      2 0x80000000
Workqueue: netns cleanup_net
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 _synchronize_rcu_expedited+0x5ab/0x850 kernel/rcu/tree_exp.h:615
 synchronize_net+0x2b/0x40 net/core/dev.c:8217
 dev_deactivate_many+0x3cf/0x980 net/sched/sch_generic.c:931
 __dev_close_many+0x10a/0x260 net/core/dev.c:1441
INFO: task syz-executor.1:8512 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29712  8512   1846 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421
 sock_do_ioctl+0x92/0xb0 net/socket.c:980
 sock_ioctl+0x253/0x440 net/socket.c:1070
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task syz-executor.1:8562 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D30064  8562   1846 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 __tun_chr_ioctl+0x125/0x31f0 drivers/net/tun.c:2309
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task syz-executor.1:8569 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D29952  8569   1846 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421
 sock_do_ioctl+0x92/0xb0 net/socket.c:980
 sock_ioctl+0x253/0x440 net/socket.c:1070
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task syz-executor.4:8518 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29024  8518   1854 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006
INFO: task syz-executor.4:8528 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29776  8528   1854 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645
 ip_setsockopt+0x36/0x90 net/ipv4/ip_sockglue.c:1248
 tcp_setsockopt net/ipv4/tcp.c:2805 [inline]
 tcp_setsockopt+0x81/0xc0 net/ipv4/tcp.c:2799
 SYSC_setsockopt net/socket.c:1864 [inline]
 SyS_setsockopt+0x12b/0x210 net/socket.c:1843
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task syz-executor.4:8533 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29024  8533   1854 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006
INFO: task syz-executor.4:8565 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29776  8565   1854 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645
 ip_setsockopt+0x36/0x90 net/ipv4/ip_sockglue.c:1248
 tcp_setsockopt net/ipv4/tcp.c:2805 [inline]
 tcp_setsockopt+0x81/0xc0 net/ipv4/tcp.c:2799
 SYSC_setsockopt net/socket.c:1864 [inline]
 SyS_setsockopt+0x12b/0x210 net/socket.c:1843
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task syz-executor.3:8560 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D27104  8560   1860 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678
 inet6_ioctl+0xff/0x1b0 net/ipv6/af_inet6.c:554
 sock_do_ioctl+0x65/0xb0 net/socket.c:973
 sock_ioctl+0x253/0x440 net/socket.c:1070
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
INFO: task syz-executor.3:8579 blocked for more than 140 seconds.
      Not tainted 4.14.105+ #29
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D30064  8579   1860 0x00000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3492
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3550
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 addrconf_add_ifaddr+0xe2/0x170 net/ipv6/addrconf.c:2966
 inet6_ioctl+0x114/0x1b0 net/ipv6/af_inet6.c:557
 sock_do_ioctl+0x65/0xb0 net/socket.c:973
 sock_ioctl+0x253/0x440 net/socket.c:1070
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0xabe/0x1040 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.?}, at: [<ffffffffa3a00e0c>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541
2 locks held by getty/1759:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffffa4538782>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffffa4533ba7>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.0/3165:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.0/3189:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by udevd/3701:
 #0:  (epmutex){+.+.}, at: [<ffffffffa3e3e56d>] ep_free+0x6d/0x220 fs/eventpoll.c:839
2 locks held by syz-executor.5/4353:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
 #1:  (sk_lock-AF_PACKET){+.+.}, at: [<ffffffffa4fd0319>] lock_sock include/net/sock.h:1456 [inline]
 #1:  (sk_lock-AF_PACKET){+.+.}, at: [<ffffffffa4fd0319>] packet_release+0x4c9/0xb80 net/packet/af_packet.c:3036
2 locks held by syz-executor.5/5598:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
 #1:  (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffffa3a48eb5>] exp_funnel_lock kernel/rcu/tree_exp.h:305 [inline]
 #1:  (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffffa3a48eb5>] _synchronize_rcu_expedited+0x375/0x850 kernel/rcu/tree_exp.h:596
1 lock held by syz-executor.0/5912:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
3 locks held by kworker/0:4/5967:
 #0:  ("%s"("ipv6_addrconf")){+.+.}, at: [<ffffffffa39287d5>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((addr_chk_work).work){+.+.}, at: [<ffffffffa392880b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
 #2:  (rtnl_mutex){+.+.}, at: [<ffffffffa4ebe26a>] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4431
2 locks held by syz-executor.3/6126:
 #0:  (epmutex){+.+.}, at: [<ffffffffa3e3e56d>] ep_free+0x6d/0x220 fs/eventpoll.c:839
 #1:  (&ep->mtx){+.+.}, at: [<ffffffffa3e3e5d9>] ep_free+0xd9/0x220 fs/eventpoll.c:859
2 locks held by syz-executor.3/7130:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
 #1:  (rtnl_mutex){+.+.}, at: [<ffffffffa4d55d5e>] raw_close+0xe/0x30 net/ipv4/raw.c:699
5 locks held by kworker/u4:23/7567:
 #0:  ("%s""netns"){+.+.}, at: [<ffffffffa39287d5>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  (net_cleanup_work){+.+.}, at: [<ffffffffa392880b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
 #2:  (net_mutex){+.+.}, at: [<ffffffffa4aeefd6>] cleanup_net+0x136/0x860 net/core/net_namespace.c:449
 #3:  (rtnl_mutex){+.+.}, at: [<ffffffffa4faf421>] ip6_tnl_exit_net+0x71/0x550 net/ipv6/ip6_tunnel.c:2265
 #4:  (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffffa3a48e47>] exp_funnel_lock kernel/rcu/tree_exp.h:272 [inline]
 #4:  (rcu_preempt_state.exp_mutex){+.+.}, at: [<ffffffffa3a48e47>] _synchronize_rcu_expedited+0x307/0x850 kernel/rcu/tree_exp.h:596
1 lock held by syz-executor.5/7794:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.0/12859:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.5/13291:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.5/13603:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.5/13613:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.5/15185:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.0/15434:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.3/16140:
 #0:  (epmutex){+.+.}, at: [<ffffffffa3e3e56d>] ep_free+0x6d/0x220 fs/eventpoll.c:839
1 lock held by syz-executor.4/16427:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.3/18223:
 #0:  (epmutex){+.+.}, at: [<ffffffffa3e3e56d>] ep_free+0x6d/0x220 fs/eventpoll.c:839
1 lock held by syz-executor.0/18235:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
2 locks held by kworker/u4:31/19722:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffffa39287d5>] process_one_work+0x6e5/0x14e0 kernel/workqueue.c:2085
 #1:  ((reaper_work).work){+.+.}, at: [<ffffffffa392880b>] process_one_work+0x71b/0x14e0 kernel/workqueue.c:2089
2 locks held by syz-executor.4/20495:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
 #1:  (rtnl_mutex){+.+.}, at: [<ffffffffa4d55d5e>] raw_close+0xe/0x30 net/ipv4/raw.c:699
2 locks held by syz-executor.3/24503:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
 #1:  (sk_lock-AF_PACKET){+.+.}, at: [<ffffffffa4fd0319>] lock_sock include/net/sock.h:1456 [inline]
 #1:  (sk_lock-AF_PACKET){+.+.}, at: [<ffffffffa4fd0319>] packet_release+0x4c9/0xb80 net/packet/af_packet.c:3036
1 lock held by syz-executor.3/28445:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.0/28524:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
2 locks held by syz-executor.3/30012:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
 #1:  (rtnl_mutex){+.+.}, at: [<ffffffffa4d55d5e>] raw_close+0xe/0x30 net/ipv4/raw.c:699
1 lock held by udevd/740:
 #0:  (epmutex){+.+.}, at: [<ffffffffa3e3e56d>] ep_free+0x6d/0x220 fs/eventpoll.c:839
1 lock held by syz-executor.1/931:
 #0:  (epmutex){+.+.}, at: [<ffffffffa3e3e56d>] ep_free+0x6d/0x220 fs/eventpoll.c:839
1 lock held by syz-executor.5/1601:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.2/1824:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.5/2121:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
1 lock held by syz-executor.1/5237:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
2 locks held by syz-executor.4/6734:
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] inode_lock include/linux/fs.h:715 [inline]
 #0:  (&sb->s_type->i_mutex_key#8){+.+.}, at: [<ffffffffa4a9dd26>] __sock_release+0x86/0x250 net/socket.c:601
 #1:  (rtnl_mutex){+.+.}, at: [<ffffffffa4d55d5e>] raw_close+0xe/0x30 net/ipv4/raw.c:699
1 lock held by syz-executor.1/8512:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b7beb5>] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421
1 lock held by syz-executor.1/8562:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa46dd035>] __tun_chr_ioctl+0x125/0x31f0 drivers/net/tun.c:2309
1 lock held by syz-executor.1/8569:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b7beb5>] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421
1 lock held by syz-executor.4/8518:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4d8721f>] devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006
1 lock held by syz-executor.4/8528:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4cb8f56>] do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645
1 lock held by syz-executor.4/8533:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4d8721f>] devinet_ioctl+0x17f/0x15c0 net/ipv4/devinet.c:1006
1 lock held by syz-executor.4/8565:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4cb8f56>] do_ip_setsockopt.isra.0+0x106/0x27c0 net/ipv4/ip_sockglue.c:645
1 lock held by syz-executor.3/8560:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4ee161a>] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678
1 lock held by syz-executor.3/8579:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4ec1292>] addrconf_add_ifaddr+0xe2/0x170 net/ipv6/addrconf.c:2966
1 lock held by syz-executor.3/8581:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4ee161a>] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678
1 lock held by syz-executor.3/8586:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4ec1292>] addrconf_add_ifaddr+0xe2/0x170 net/ipv6/addrconf.c:2966
1 lock held by syz-executor.3/8587:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4ee161a>] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678
1 lock held by syz-executor.3/8590:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4ee161a>] ipv6_route_ioctl+0x1ca/0x280 net/ipv6/route.c:2678
1 lock held by syz-executor.3/8592:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa46dd035>] __tun_chr_ioctl+0x125/0x31f0 drivers/net/tun.c:2309
1 lock held by syz-executor.5/8561:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b57ec0>] rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b57ec0>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280
1 lock held by syz-executor.5/8578:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b57ec0>] rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b57ec0>] rtnetlink_rcv_msg+0x330/0xb40 net/core/rtnetlink.c:4280
1 lock held by syz-executor.0/8583:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b7beb5>] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421
1 lock held by syz-executor.0/8585:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b7beb5>] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421
1 lock held by syz-executor.2/8596:
 #0:  (rtnl_mutex){+.+.}, at: [<ffffffffa4b7beb5>] dev_ioctl+0x285/0xca0 net/core/dev_ioctl.c:421

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.105+ #29
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.105+ #29
Workqueue: events rtc_timer_do_work
task: ffff8881d66ac680 task.stack: ffff8881d66c8000
RIP: 0010:__lock_release kernel/locking/lockdep.c:3760 [inline]
RIP: 0010:lock_release+0x1de/0x730 kernel/locking/lockdep.c:4010
RSP: 0018:ffff8881d66cf9a8 EFLAGS: 00000002
RAX: 0000000000000004 RBX: 1ffff1103acd9f38 RCX: ffff8881d66cf9e0
RDX: 0000000000000004 RSI: 1ffffffff4b58485 RDI: ffff8881d66aceac
RBP: ffffffffa720a5a0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000246 R11: 0000000000000001 R12: ffff8881d1f36b88
R13: ffff8881d66ac680 R14: 0000000000000004 R15: ffff8881d66acea8
FS:  0000000000000000(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe9ffa3700 CR3: 0000000209226006 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
Code: 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4e 04 00 00 44 89 f0 0b 05 c0 bd 80 03 0f 84 49 03 00 00 48 8d 4c 24 38 44 89 f2 <4c> 89 e6 4c 89 ef e8 57 6a ff ff 48 85 c0 48 89 c1 0f 84 15 03 

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/03/11 05:01 android-4.14 b11964adfe4c 12365b99 .config console log report ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.