netlink: 13 bytes leftover after parsing attributes in process `syz-executor6'.
netlink: 13 bytes leftover after parsing attributes in process `syz-executor6'.
==================================================================
BUG: KASAN: out-of-bounds in unwind_get_return_address+0x92/0xa0 arch/x86/kernel/unwind_frame.c:17
Read of size 8 at addr ffff8801d01af8f8 by task syz-executor1/6881

CPU: 1 PID: 6881 Comm: syz-executor1 Not tainted 4.9.86-gb324a70 #50
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801cfc7f7d0 ffffffff81d956f9 ffffea0007406bc0 ffff8801d01af8f8
 0000000000000000 ffff8801d01af900 0000000000000000 ffff8801cfc7f808
 ffffffff8153e083 ffff8801d01af8f8 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d956f9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d956f9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153e083>] print_address_description+0x73/0x280 mm/kasan/report.c:252
 [<ffffffff8153e5a5>] kasan_report_error mm/kasan/report.c:351 [inline]
 [<ffffffff8153e5a5>] kasan_report+0x275/0x360 mm/kasan/report.c:408
 [<ffffffff8153e704>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429
 [<ffffffff810d4db2>] unwind_get_return_address+0x92/0xa0 arch/x86/kernel/unwind_frame.c:17
 [<ffffffff8107c66d>] __save_stack_trace+0x8d/0xf0 arch/x86/kernel/stacktrace.c:43
 [<ffffffff8107c738>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816c5a66>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c7238>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e92bf>] seq_read+0x32f/0x1290 fs/seq_file.c:240
 [<ffffffff8156cb98>] do_loop_readv_writev.part.17+0xc8/0x2b0 fs/read_write.c:715
 [<ffffffff81570cdd>] do_loop_readv_writev fs/read_write.c:879 [inline]
 [<ffffffff81570cdd>] do_readv_writev+0x5fd/0x740 fs/read_write.c:873
 [<ffffffff81570ea4>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff81570fc6>] do_readv+0xe6/0x250 fs/read_write.c:923
 [<ffffffff81574497>] SYSC_readv fs/read_write.c:1010 [inline]
 [<ffffffff81574497>] SyS_readv+0x27/0x30 fs/read_write.c:1007
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b5613>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

The buggy address belongs to the page:
page:ffffea0007406bc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d01af800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d01af880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801d01af900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                   ^
 ffff8801d01af980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d01afa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================