binder_alloc: 10472: binder_alloc_buf, no vma
binder: 10472:10485 transaction failed 29189/-3, size 0-12288 line 2971
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 10507 at lib/refcount.c:187 refcount_sub_and_test+0x2d3/0x330 lib/refcount.c:187
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 10507 Comm: syz-executor5 Not tainted 4.17.0-rc7+ #97
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1b9/0x294 lib/dump_stack.c:113
 panic+0x22f/0x4de kernel/panic.c:184
 __warn.cold.8+0x163/0x1b3 kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1de/0x490 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:refcount_sub_and_test+0x2d3/0x330 lib/refcount.c:187
RSP: 0018:ffff880191d06160 EFLAGS: 00010282
RAX: 0000000000000026 RBX: 0000000000000000 RCX: ffffffff8160be2d
RDX: 0000000000000000 RSI: ffffffff81610ae1 RDI: ffff880191d05cc0
RBP: ffff880191d06248 R08: ffff8801b08d2140 R09: 0000000000000006
R10: ffff8801b08d2140 R11: 0000000000000000 R12: 00000000ffffff01
R13: ffff880191d06220 R14: 0000000000000500 R15: 0000000000000000
 sock_wfree+0xb8/0x180 net/core/sock.c:1822
 sctp_wfree+0x400/0xb70 net/sctp/socket.c:8270
 skb_release_head_state+0x15f/0x2e0 net/core/skbuff.c:612
 skb_release_all+0x15/0x60 net/core/skbuff.c:625
 __kfree_skb net/core/skbuff.c:641 [inline]
 consume_skb+0x18b/0x550 net/core/skbuff.c:701
 sctp_chunk_destroy net/sctp/sm_make_chunk.c:1477 [inline]
 sctp_chunk_put+0x2c0/0x440 net/sctp/sm_make_chunk.c:1504
 sctp_chunk_free+0x53/0x60 net/sctp/sm_make_chunk.c:1491
 __sctp_outq_teardown+0x377/0x1290 net/sctp/outqueue.c:234
 sctp_outq_free+0x15/0x20 net/sctp/outqueue.c:291
 sctp_association_free+0x2e8/0x959 net/sctp/associola.c:356
 sctp_cmd_delete_tcb net/sctp/sm_sideeffect.c:939 [inline]
 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1353 [inline]
 sctp_side_effects net/sctp/sm_sideeffect.c:1220 [inline]
 sctp_do_sm+0x49de/0x7160 net/sctp/sm_sideeffect.c:1191
 sctp_primitive_ABORT+0xa0/0xd0 net/sctp/primitive.c:119
 sctp_close+0x271/0xa50 net/sctp/socket.c:1560
 inet_release+0x104/0x1f0 net/ipv4/af_inet.c:427
 sock_release+0x96/0x1b0 net/socket.c:594
 sock_close+0x16/0x20 net/socket.c:1149
 __fput+0x34d/0x890 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x1e4/0x290 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x1aee/0x2730 kernel/exit.c:865
 do_group_exit+0x16f/0x430 kernel/exit.c:968
 get_signal+0x886/0x1960 kernel/signal.c:2482
 do_signal+0x98/0x2040 arch/x86/kernel/signal.c:810
 exit_to_usermode_loop+0x28a/0x310 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:196 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:265 [inline]
 do_syscall_32_irqs_on arch/x86/entry/common.c:338 [inline]
 do_fast_syscall_32+0xcc3/0xf9b arch/x86/entry/common.c:394
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f1acb9
RSP: 002b:00000000f5ef510c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 000000000814af94 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..