binder: 12167:12170 BC_INCREFS_DONE uffffffffffffffff no match
==================================================================
BUG: KASAN: use-after-free in memcpy include/linux/string.h:344 [inline]
BUG: KASAN: use-after-free in array_map_update_elem+0x197/0x240 kernel/bpf/arraymap.c:249
Write of size 1 at addr ffff8801c47f2600 by task syz-executor4/12177

CPU: 1 PID: 12177 Comm: syz-executor4 Not tainted 4.15.0-rc7-mm1+ #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 print_address_description+0x73/0x250 mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report+0x23b/0x360 mm/kasan/report.c:412
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x137/0x190 mm/kasan/kasan.c:267
 memcpy+0x37/0x50 mm/kasan/kasan.c:303
 memcpy include/linux/string.h:344 [inline]
 array_map_update_elem+0x197/0x240 kernel/bpf/arraymap.c:249
 map_update_elem kernel/bpf/syscall.c:687 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1811 [inline]
 SyS_bpf+0x32df/0x4400 kernel/bpf/syscall.c:1782
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452ac9
RSP: 002b:00007f75076edc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 0000000000000020 RSI: 0000000020eaf000 RDI: 0000000000000002
RBP: 0000000000000036 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006ee5b0
R13: 00000000ffffffff R14: 00007f75076ee6d4 R15: 0000000000000000

Allocated by task 11733:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:552
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 kmem_cache_alloc_node+0x144/0x760 mm/slab.c:3631
 alloc_task_struct_node kernel/fork.c:157 [inline]
 dup_task_struct kernel/fork.c:781 [inline]
 copy_process.part.37+0x19b0/0x4b60 kernel/fork.c:1644
 copy_process kernel/fork.c:1619 [inline]
 _do_fork+0x1f7/0xf70 kernel/fork.c:2100
 SYSC_clone kernel/fork.c:2208 [inline]
 SyS_clone+0x37/0x50 kernel/fork.c:2202
 do_syscall_64+0x273/0x920 arch/x86/entry/common.c:285
 return_from_SYSCALL_64+0x0/0x75

Freed by task 3742:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:520
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:527
 __cache_free mm/slab.c:3485 [inline]
 kmem_cache_free+0x86/0x2b0 mm/slab.c:3743
 free_task_struct kernel/fork.c:162 [inline]
 free_task+0x148/0x1a0 kernel/fork.c:391
 __put_task_struct+0x231/0x3c0 kernel/fork.c:668
 put_task_struct include/linux/sched/task.h:96 [inline]
 delayed_put_task_struct+0xca/0x3d0 kernel/exit.c:180
 __rcu_reclaim kernel/rcu/rcu.h:172 [inline]
 rcu_do_batch kernel/rcu/tree.c:2674 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2933 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2900 [inline]
 rcu_process_callbacks+0xd6c/0x17f0 kernel/rcu/tree.c:2917
 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285

The buggy address belongs to the object at ffff8801c47f2300
 which belongs to the cache task_struct of size 6016
The buggy address is located 768 bytes inside of
 6016-byte region [ffff8801c47f2300, ffff8801c47f3a80)
The buggy address belongs to the page:
page:ffffea000711fc80 count:1 mapcount:0 mapping:ffff8801c47f2300 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff8801c47f2300 0000000000000000 0000000100000001
raw: ffffea00071038a0 ffffea0007380220 ffff8801dad30200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c47f2500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801c47f2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8801c47f2600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff8801c47f2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801c47f2700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================