binder: undelivered TRANSACTION_ERROR: 29201
binder: undelivered TRANSACTION_ERROR: 29189
BUG: unable to handle kernel paging request at ffffed0045806c8e
IP: bytes_is_nonzero mm/kasan/kasan.c:166 [inline]
IP: memory_is_nonzero mm/kasan/kasan.c:184 [inline]
IP: memory_is_poisoned_n mm/kasan/kasan.c:210 [inline]
IP: memory_is_poisoned mm/kasan/kasan.c:241 [inline]
IP: check_memory_region_inline mm/kasan/kasan.c:257 [inline]
IP: check_memory_region+0x61/0x190 mm/kasan/kasan.c:267
PGD 21ffee067 P4D 21ffee067 PUD 21ffec067 PMD 0 
Oops: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
==================================================================
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 8 at addr ffff8801d0983cb8 by task syz-executor4/8460

CPU: 0 PID: 8460 Comm: syz-executor4 Not tainted 4.15.0-rc7-next-20180111+ #94
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:00007fe2018f0c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fe2018f1700 RCX: 0000000000452ac9
RDX: 0000000000000020 RSI: 00000000202a6fe0 RDI: 0000000000000002
RBP: 0000000000a2f870 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
R13: 0000000000a2f7ef R14: 00007fe2018f19c0 R15: 0000000000000005

Allocated by task 3591:
 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
 kmem_cache_alloc_trace+0x136/0x750 mm/slab.c:3607
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:704 [inline]
 seq_open+0x83/0x1f0 fs/seq_file.c:54
 single_open+0x100/0x1d0 fs/seq_file.c:571
 proc_single_open+0x24/0x30 fs/proc/base.c:755
 do_dentry_open+0x667/0xd40 fs/open.c:752
 vfs_open+0x107/0x220 fs/open.c:866
 do_last fs/namei.c:3397 [inline]
 path_openat+0x1151/0x3530 fs/namei.c:3537
 do_filp_open+0x25b/0x3b0 fs/namei.c:3572
 do_sys_open+0x502/0x6d0 fs/open.c:1059
 SYSC_open fs/open.c:1077 [inline]
 SyS_open+0x2d/0x40 fs/open.c:1072
 entry_SYSCALL_64_fastpath+0x29/0xa0

Freed by task 3591:
 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]
 kfree+0xd9/0x260 mm/slab.c:3800
 seq_release fs/seq_file.c:366 [inline]
 single_release+0x80/0xb0 fs/seq_file.c:602
 __fput+0x327/0x7e0 fs/file_table.c:209
 ____fput+0x15/0x20 fs/file_table.c:243
 task_work_run+0x199/0x270 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x275/0x2f0 arch/x86/entry/common.c:165
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath+0x490/0x550 arch/x86/entry/common.c:264
 entry_SYSCALL_64_fastpath+0x9e/0xa0

The buggy address belongs to the object at ffff8801d0983c80
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 56 bytes inside of
 256-byte region [ffff8801d0983c80, ffff8801d0983d80)
The buggy address belongs to the page:
page:ffffea00074260c0 count:1 mapcount:0 mapping:ffff8801d0983000 index:0xffff8801d0983dc0
flags: 0x2fffc0000000100(slab)
raw: 02fffc0000000100 ffff8801d0983000 ffff8801d0983dc0 0000000100000007
raw: ffffea00074788a0 ffffea0007416be0 ffff8801dac007c0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d0983b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801d0983c00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8801d0983c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff8801d0983d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8801d0983d80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
==================================================================