binder: 5596:5615 ioctl 40046207 0 returned -16
binder: 5596:5608 ioctl c0306201 20000240 returned -14
binder_alloc: binder_alloc_mmap_handler: 5596 20000000-20002000 already mapped failed -16
binder: undelivered TRANSACTION_ERROR: 29201
==================================================================
BUG: KASAN: stack-out-of-bounds in get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
BUG: KASAN: stack-out-of-bounds in __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76
Read of size 8 at addr ffff8801af5a7208 by task syz-executor6/5618

CPU: 1 PID: 5618 Comm: syz-executor6 Not tainted 4.9.89-g960923f #61
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801aee4f7f0 ffffffff81d96069 ffffea0006bd69c0 ffff8801af5a7208
 0000000000000000 ffff8801af5a7208 ffff8801aee4f920 ffff8801aee4f828
 ffffffff8153e8f3 ffff8801af5a7208 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d96069>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d96069>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153e8f3>] print_address_description+0x73/0x280 mm/kasan/report.c:256
 [<ffffffff8153edf5>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff8153edf5>] kasan_report+0x255/0x380 mm/kasan/report.c:412
 [<ffffffff8153ef94>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810d54f7>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810d54f7>] __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76
 [<ffffffff8107c809>] unwind_start arch/x86/include/asm/unwind.h:39 [inline]
 [<ffffffff8107c809>] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41
 [<ffffffff8107c908>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816c6336>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c7b08>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e9b2f>] seq_read+0x32f/0x1290 fs/seq_file.c:240
 [<ffffffff8156d498>] do_loop_readv_writev.part.17+0xc8/0x2b0 fs/read_write.c:715
 [<ffffffff815715dd>] do_loop_readv_writev fs/read_write.c:879 [inline]
 [<ffffffff815715dd>] do_readv_writev+0x5fd/0x740 fs/read_write.c:873
 [<ffffffff815717a4>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff81571b45>] do_preadv+0x115/0x1a0 fs/read_write.c:974
 [<ffffffff81574e00>] SYSC_preadv fs/read_write.c:1024 [inline]
 [<ffffffff81574e00>] SyS_preadv+0x30/0x40 fs/read_write.c:1019
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b7ad3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

The buggy address belongs to the page:
page:ffffea0006bd69c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801af5a7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801af5a7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801af5a7200: f1 f1 f1 f1 04 f2 f2 f2 f2 f2 f2 f2 00 00 00 00
                      ^
 ffff8801af5a7280: 00 04 f2 f2 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801af5a7300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================