=====================================
[ BUG: bad unlock balance detected! ]
4.9.67-gf26d3c7 #106 Not tainted
-------------------------------------
syz-executor5/16222 is trying to release lock (mrt_lock[   91.228405] binder: 16235:16240 BC_INCREFS_DONE u4004630600000000 no match
) at:
but there are no more locks to release!

other info that might help us debug this:
2 locks held by syz-executor5/16222:
binder: BINDER_SET_CONTEXT_MGR already set
binder: 16235:16240 ioctl 40046207 0 returned -16
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 16236 Comm: syz-executor1 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d65f7840 ffffffff81d906e9 ffff8801d65f7b20 0000000000000000
 ffff8801c761bf10 ffff8801d65f7a10 ffff8801c761be00 ffff8801d65f7a38
 ffffffff8165e307 ffffffff838a9178 ffff8801d65f7990 00000001d1165067
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e307>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd5f1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd5f1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd5f1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd5f1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810dd452>] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406
 [<ffffffff810ddbf7>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff838aab58>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff815e8f60>] SYSC_fsetxattr fs/xattr.c:504 [inline]
 [<ffffffff815e8f60>] SyS_fsetxattr+0x130/0x190 fs/xattr.c:493
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 16245 Comm: syz-executor1 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a5d4f740 ffffffff81d906e9 ffff8801a5d4fa20 0000000000000000
 ffff8801c761bf10 ffff8801a5d4f910 ffff8801c761be00 ffff8801a5d4f938
 ffffffff8165e307 0000000000000000 ffff8801a5d4f890 00000001d1165067
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e307>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd5f1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd5f1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd5f1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd5f1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810dd452>] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406
 [<ffffffff810ddbf7>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff838aab58>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff815a822d>] do_fcntl fs/fcntl.c:274 [inline]
 [<ffffffff815a822d>] SYSC_fcntl fs/fcntl.c:372 [inline]
 [<ffffffff815a822d>] SyS_fcntl+0x8fd/0xc70 fs/fcntl.c:357
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 16220 Comm: syz-executor1 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cb0af630 ffffffff81d906e9 ffff8801cb0af910 0000000000000000
 ffff8801c761bf10 ffff8801cb0af800 ffff8801c761be00 ffff8801cb0af828
 ffffffff8165e307 0000000000003801 ffff8801cb0af780 00000001d1165067
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e307>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd5f1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd5f1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd5f1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd5f1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810dd452>] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406
 [<ffffffff810ddbf7>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff838aab58>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff81568cb1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156cb20>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156cb20>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156d287>] vfs_writev+0x87/0xc0 fs/read_write.c:911
 [<ffffffff8156d3a6>] do_writev+0xe6/0x250 fs/read_write.c:944
 [<ffffffff81570417>] SYSC_writev fs/read_write.c:1017 [inline]
 [<ffffffff81570417>] SyS_writev+0x27/0x30 fs/read_write.c:1014
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 16245 Comm: syz-executor1 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a5d4f740 ffffffff81d906e9 ffff8801a5d4fa20 0000000000000000
 ffff8801c761b190 ffff8801a5d4f910 ffff8801c761b080 ffff8801a5d4f938
 ffffffff8165e307 ffff8801a5d4f798 ffff8801a5d4f890 00000001cf423067
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e307>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd5f1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd5f1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd5f1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd5f1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810dd452>] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406
 [<ffffffff810ddbf7>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff838aab58>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff815a822d>] do_fcntl fs/fcntl.c:274 [inline]
 [<ffffffff815a822d>] SYSC_fcntl fs/fcntl.c:372 [inline]
 [<ffffffff815a822d>] SyS_fcntl+0x8fd/0xc70 fs/fcntl.c:357
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 16236 Comm: syz-executor1 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d65f7630 ffffffff81d906e9 ffff8801d65f7910 0000000000000000
 ffff8801c761b190 ffff8801d65f7800 ffff8801c761b080 ffff8801d65f7828
 ffffffff8165e307 ffffed003b25a31a ffff8801d65f7780 00000001cf423067
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e307>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd5f1>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd5f1>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd5f1>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd5f1>] handle_mm_fault+0x1fd1/0x2530 mm/memory.c:3614
 [<ffffffff810dd452>] __do_page_fault+0x5c2/0xd40 arch/x86/mm/fault.c:1406
 [<ffffffff810ddbf7>] do_page_fault+0x27/0x30 arch/x86/mm/fault.c:1469
 [<ffffffff838aab58>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff81568cb1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156cb20>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156cb20>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156d287>] vfs_writev+0x87/0xc0 fs/read_write.c:911
 [<ffffffff8156d3a6>] do_writev+0xe6/0x250 fs/read_write.c:944
 [<ffffffff81570417>] SYSC_writev fs/read_write.c:1017 [inline]
 [<ffffffff81570417>] SyS_writev+0x27/0x30 fs/read_write.c:1014
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815cf8df>] __fdget_pos+0x9f/0xc0 fs/file.c:781
 #1:  (&p->lock){+.+.+.}, at: [<ffffffff815e4cdd>] seq_read+0xdd/0x1290 fs/seq_file.c:178

stack backtrace:
CPU: 0 PID: 16222 Comm: syz-executor5 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a64ff8e8 ffffffff81d906e9 ffffffff849ae8f8 ffff8801a6b2c800
 ffffffff834dec54 ffffffff849ae8f8 ffff8801a6b2d088 ffff8801a64ff918
 ffffffff812353f4 dffffc0000000000 ffffffff849ae8f8 00000000ffffffff
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff812353f4>] print_unlock_imbalance_bug+0x174/0x1a0 kernel/locking/lockdep.c:3398
 [<ffffffff8123dec8>] __lock_release kernel/locking/lockdep.c:3540 [inline]
 [<ffffffff8123dec8>] lock_release+0x6f8/0xb80 kernel/locking/lockdep.c:3775
 [<ffffffff838a951a>] __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline]
 [<ffffffff838a951a>] _raw_read_unlock+0x1a/0x50 kernel/locking/spinlock.c:255
 [<ffffffff834dec54>] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553
 [<ffffffff815e5683>] seq_read+0xa83/0x1290 fs/seq_file.c:283
 [<ffffffff816be32f>] proc_reg_read+0xef/0x170 fs/proc/inode.c:202
 [<ffffffff81568cb1>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156cb20>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156cb20>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156cdd4>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156cef6>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff815703e7>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff815703e7>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
IPVS: Creating netns size=2536 id=18
SELinux: unrecognized netlink message: protocol=6 nlmsg_type=257 sclass=netlink_xfrm_socket pig=16291 comm=syz-executor4
SELinux: unrecognized netlink message: protocol=6 nlmsg_type=257 sclass=netlink_xfrm_socket pig=16331 comm=syz-executor4
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
pktgen: kernel_thread() failed for cpu 0
pktgen: Cannot create thread for cpu 0 (-4)
pktgen: kernel_thread() failed for cpu 1
pktgen: Cannot create thread for cpu 1 (-4)
pktgen: Initialization failed for all threads
device lo entered promiscuous mode
IPv6: Can't replace route, no match found
IPv6: Can't replace route, no match found
device gre0 entered promiscuous mode
sock: sock_set_timeout: `syz-executor0' (pid 16532) tries to set negative timeout
sock: sock_set_timeout: `syz-executor0' (pid 16532) tries to set negative timeout
device gre0 left promiscuous mode
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=16622 comm=syz-executor3
SELinux: unrecognized netlink message: protocol=4 nlmsg_type=0 sclass=netlink_tcpdiag_socket pig=16648 comm=syz-executor3
binder: 16668:16670 ioctl c018620b 20009fe8 returned -14
binder: 16668:16670 ERROR: BC_REGISTER_LOOPER called without request
binder: 16668:16670 ERROR: BC_REGISTER_LOOPER called without request
PF_BRIDGE: RTM_SETLINK with unknown ifindex
nla_parse: 6 callbacks suppressed
netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'.
PF_BRIDGE: RTM_SETLINK with unknown ifindex
device gre0 entered promiscuous mode
netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16752 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16752 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=202 sclass=netlink_route_socket pig=16752 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16756 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=16756 comm=syz-executor2
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=202 sclass=netlink_route_socket pig=16752 comm=syz-executor2
device gre0 entered promiscuous mode
binder: 16827:16829 BC_DEAD_BINDER_DONE 0000000000000003 not found
binder: 16827:16829 got transaction to invalid handle
binder: 16827:16829 transaction failed 29201/-22, size 24-16 line 3007
binder: 16827:16839 Acquire 1 refcount change on invalid ref 0 ret -22
binder: 16827:16829 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
binder: 16827:16839 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0
binder: 16827:16839 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
binder: 16827:16863 BC_DEAD_BINDER_DONE 0000000000000003 not found
binder: 16827:16863 Release 1 refcount change on invalid ref 0 ret -22
binder: 16827:16863 got transaction to invalid handle
binder: 16827:16863 transaction failed 29201/-22, size 24-16 line 3007
binder: undelivered death notification, 0000000000000000
device gre0 entered promiscuous mode
9pnet_virtio: no channels available for device ./file0
9pnet_virtio: no channels available for device ./file0
keychord: keycode 16224 out of range
device gre0 entered promiscuous mode
keychord: keycode 16224 out of range
device gre0 left promiscuous mode
device gre0 entered promiscuous mode
device gre0 left promiscuous mode
device gre0 entered promiscuous mode
netlink: 11 bytes leftover after parsing attributes in process `syz-executor5'.
netlink: 11 bytes leftover after parsing attributes in process `syz-executor5'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 1 bytes leftover after parsing attributes in process `syz-executor6'.
Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable
device syz7 entered promiscuous mode
Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable