==================================================================
BUG: KASAN: out-of-bounds in get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
BUG: KASAN: out-of-bounds in __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76
Read of size 8 at addr ffff8801b5c97870 by task syz-executor7/3241

CPU: 0 PID: 3241 Comm: syz-executor7 Not tainted 4.9.90-gdd1e37e #66
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d92b78a8 ffffffff81d94ee9 ffffea0006d725c0 ffff8801b5c97870
 0000000000000000 ffff8801b5c97878 ffff8801d92b79d8 ffff8801d92b78e0
 ffffffff8153d3b3 ffff8801b5c97870 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81d94ee9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94ee9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153d3b3>] print_address_description+0x73/0x280 mm/kasan/report.c:256
 [<ffffffff8153d8b5>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff8153d8b5>] kasan_report+0x255/0x380 mm/kasan/report.c:412
 [<ffffffff8153da54>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810d64f7>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810d64f7>] __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
 [<ffffffff816c4df6>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c65c8>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e85ef>] seq_read+0x32f/0x1290 fs/seq_file.c:240
 [<ffffffff8156b3f3>] __vfs_read+0x103/0x670 fs/read_write.c:449
 [<ffffffff8156f30e>] vfs_read+0x11e/0x380 fs/read_write.c:472
 [<ffffffff815733cf>] SYSC_pread64 fs/read_write.c:626 [inline]
 [<ffffffff815733cf>] SyS_pread64+0x13f/0x170 fs/read_write.c:613
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b8493>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

The buggy address belongs to the page:
page:ffffea0006d725c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801b5c97700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801b5c97780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801b5c97800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                                ^
 ffff8801b5c97880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801b5c97900: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 f3 f3 f3 f3
==================================================================
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3241 Comm: syz-executor7 Tainted: G    B           4.9.90-gdd1e37e #66
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d92b7800 ffffffff81d94ee9 ffffffff84197d47 ffff8801d92b78d8
 0000000000000000 ffff8801b5c97878 ffff8801d92b79d8 ffff8801d92b78c8
 ffffffff8142e651 0000000041b58ab3 ffffffff8418b7a0 ffffffff8142e495
Call Trace:
 [<ffffffff81d94ee9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d94ee9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8142e651>] panic+0x1bc/0x3a8 kernel/panic.c:179
 [<ffffffff8153d320>] kasan_end_report+0x50/0x50 mm/kasan/report.c:180
 [<ffffffff8153d7cb>] kasan_report_error mm/kasan/report.c:360 [inline]
 [<ffffffff8153d7cb>] kasan_report+0x16b/0x380 mm/kasan/report.c:412
 [<ffffffff8153da54>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810d64f7>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810d64f7>] __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
 [<ffffffff816c4df6>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c65c8>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e85ef>] seq_read+0x32f/0x1290 fs/seq_file.c:240
 [<ffffffff8156b3f3>] __vfs_read+0x103/0x670 fs/read_write.c:449
 [<ffffffff8156f30e>] vfs_read+0x11e/0x380 fs/read_write.c:472
 [<ffffffff815733cf>] SYSC_pread64 fs/read_write.c:626 [inline]
 [<ffffffff815733cf>] SyS_pread64+0x13f/0x170 fs/read_write.c:613
 [<ffffffff81006504>] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282
 [<ffffffff838b8493>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..