binder: 5076:5082 got transaction to invalid handle
binder: 5076:5082 transaction failed 29201/-22, size 24-16 line 3007
[ BUG: bad unlock balance detected! ]
binder: 5076:5082 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
binder: 5076:5095 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0
4.9.68-gfb66dc2 #107 Not tainted
-------------------------------------
syz-executor6/5088 is trying to release lock ([   34.697263] binder: 5076:5098 BC_DEAD_BINDER_DONE 0000000000000003 not found
binder: 5076:5098 Release 1 refcount change on invalid ref 0 ret -22
binder: 5076:5098 got transaction to invalid handle
binder: 5076:5098 transaction failed 29201/-22, size 24-16 line 3007
mrt_lock) at:
but there are no more locks to release!

other info that might help us debug this:
1 lock held by syz-executor6/5088:
 #0:  (&p->lock){+.+.+.}, at: [<ffffffff815e4e5d>] seq_read+0xdd/0x1290 fs/seq_file.c:178

stack backtrace:
CPU: 0 PID: 5088 Comm: syz-executor6 Not tainted 4.9.68-gfb66dc2 #107
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a8f0f8e8 ffffffff81d90889 ffffffff849ae9f8 ffff8801a6d7e000
 ffffffff834dfc54 ffffffff849ae9f8 ffff8801a6d7e888 ffff8801a8f0f918
 ffffffff812353f4 dffffc0000000000 ffffffff849ae9f8 00000000ffffffff
Call Trace:
 [<ffffffff81d90889>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90889>] 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
 [<ffffffff838aa55a>] __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline]
 [<ffffffff838aa55a>] _raw_read_unlock+0x1a/0x50 kernel/locking/spinlock.c:255
 [<ffffffff834dfc54>] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553
 [<ffffffff815e5803>] seq_read+0xa83/0x1290 fs/seq_file.c:283
 [<ffffffff816be4bf>] proc_reg_read+0xef/0x170 fs/proc/inode.c:202
 [<ffffffff81568e31>] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714
 [<ffffffff8156cca0>] do_loop_readv_writev fs/read_write.c:880 [inline]
 [<ffffffff8156cca0>] do_readv_writev+0x520/0x750 fs/read_write.c:874
 [<ffffffff8156cf54>] vfs_readv+0x84/0xc0 fs/read_write.c:898
 [<ffffffff8156d076>] do_readv+0xe6/0x250 fs/read_write.c:924
 [<ffffffff81570567>] SYSC_readv fs/read_write.c:1011 [inline]
 [<ffffffff81570567>] SyS_readv+0x27/0x30 fs/read_write.c:1008
 [<ffffffff838aa9c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
netlink: 21 bytes leftover after parsing attributes in process `syz-executor1'.
Option '                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
Option '                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
device gre0 entered promiscuous mode
netlink: 6 bytes leftover after parsing attributes in process `syz-executor7'.
netlink: 6 bytes leftover after parsing attributes in process `syz-executor7'.
FAULT_FLAG_ALLOW_RETRY missing 30
CPU: 1 PID: 5310 Comm: syz-executor4 Not tainted 4.9.68-gfb66dc2 #107
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c4f8f940 ffffffff81d90889 ffff8801c4f8fc20 0000000000000000
 ffff8801abe73190 ffff8801c4f8fb10 ffff8801abe73080 ffff8801c4f8fb38
 ffffffff8165e497 0000000000000000 ffff8801c4f8fa90 00000001caaa7067
Call Trace:
 [<ffffffff81d90889>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90889>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e497>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd771>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd771>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd771>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd771>] 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
 [<ffffffff838abb98>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838aa9c5>] entry_SYSCALL_64_fastpath+0x23/0xc6
FAULT_FLAG_ALLOW_RETRY missing 30
device gre0 entered promiscuous mode
CPU: 1 PID: 5300 Comm: syz-executor4 Not tainted 4.9.68-gfb66dc2 #107
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c9d6f940 ffffffff81d90889 ffff8801c9d6fc20 0000000000000000
 ffff8801abe73310 ffff8801c9d6fb10 ffff8801abe73200 ffff8801c9d6fb38
 ffffffff8165e497 1ffff100393adf2f ffff8801c9d6fa90 00000001caaa7067
Call Trace:
 [<ffffffff81d90889>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d90889>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8165e497>] handle_userfault+0xa37/0x1300 fs/userfaultfd.c:323
 [<ffffffff814cd771>] do_anonymous_page mm/memory.c:2747 [inline]
 [<ffffffff814cd771>] handle_pte_fault mm/memory.c:3488 [inline]
 [<ffffffff814cd771>] __handle_mm_fault mm/memory.c:3577 [inline]
 [<ffffffff814cd771>] 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
 [<ffffffff838abb98>] page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1012
 [<ffffffff838aa9c5>] entry_SYSCALL_64_fastpath+0x23/0xc6