device lo left promiscuous mode
IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
qtaguid: iface_stat: create6(lo): no inet dev
==================================================================
BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x98/0xb0 arch/x86/kernel/unwind_frame.c:17
Read of size 8 at addr ffff8801ac2f7df8 by task syz-executor6/11422

CPU: 1 PID: 11422 Comm: syz-executor6 Not tainted 4.9.93-gf6bec4e #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a149f7c8 ffffffff81d9c299 ffffea0006b0bdc0 ffff8801ac2f7df8
 0000000000000000 ffff8801ac2f7df8 ffff8801c42fa8c0 ffff8801a149f800
 ffffffff8156534b ffff8801ac2f7df8 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d9c299>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d9c299>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8156534b>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff815655bf>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff815655bf>] kasan_report.cold.6+0xac/0x2f5 mm/kasan/report.c:412
 [<ffffffff815393d4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810d0c78>] unwind_get_return_address+0x98/0xb0 arch/x86/kernel/unwind_frame.c:17
 [<ffffffff8107addd>] __save_stack_trace+0x8d/0xf0 arch/x86/kernel/stacktrace.c:43
 [<ffffffff8107aea8>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816cd588>] proc_pid_stack+0x148/0x220 fs/proc/base.c:467
 [<ffffffff816cea2d>] proc_single_show+0xfd/0x170 fs/proc/base.c:769
 [<ffffffff815ea886>] seq_read+0x4b6/0x12e0 fs/seq_file.c:240
 [<ffffffff8156cbe5>] do_loop_readv_writev.part.18+0xd5/0x280 fs/read_write.c:718
 [<ffffffff81570b35>] do_loop_readv_writev fs/read_write.c:707 [inline]
 [<ffffffff81570b35>] do_readv_writev+0x565/0x7a0 fs/read_write.c:873
 [<ffffffff81570df4>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff81570f16>] do_readv+0xe6/0x260 fs/read_write.c:923
 [<ffffffff81574777>] SYSC_readv fs/read_write.c:1010 [inline]
 [<ffffffff81574777>] SyS_readv+0x27/0x30 fs/read_write.c:1007
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff838d5953>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

The buggy address belongs to the page:
page:ffffea0006b0bdc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801ac2f7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801ac2f7d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801ac2f7d80: 00 00 f1 f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2
                                                                ^
 ffff8801ac2f7e00: f2 f2 f2 f2 f2 f2 00 00 f2 f2 00 00 00 00 00 00
 ffff8801ac2f7e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================