sd 0:0:1:0: [sg0] tag#246 CDB[40]: 00 00 00 00 00 00 00
==================================================================
BUG: KASAN: out-of-bounds in unwind_next_frame+0xcd/0xe0 arch/x86/kernel/unwind_frame.c:51
Read of size 8 at addr ffff8801c865f828 by task syz-executor5/17101

CPU: 1 PID: 17101 Comm: syz-executor5 Not tainted 4.9.118-g47b77b8 #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801a57676c0 ffffffff81eb4b89 ffffea00072197c0 ffff8801c865f828
 0000000000000000 ffff8801c865f830 ffff8801c7988140 ffff8801a57676f8
 ffffffff81567f29 ffff8801c865f828 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81eb4b89>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb4b89>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81567f29>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff81568333>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff81568333>] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412
 [<ffffffff8153beb4>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810d2ead>] unwind_next_frame+0xcd/0xe0 arch/x86/kernel/unwind_frame.c:51
 [<ffffffff8107b9cd>] __save_stack_trace+0x7d/0xf0 arch/x86/kernel/stacktrace.c:42
 [<ffffffff8107baa8>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816d7dc8>] proc_pid_stack+0x148/0x220 fs/proc/base.c:469
 [<ffffffff816d94bd>] proc_single_show+0xfd/0x170 fs/proc/base.c:771
 [<ffffffff815ea713>] traverse+0x363/0x920 fs/seq_file.c:124
 [<ffffffff815ee019>] seq_read+0xd19/0x12e0 fs/seq_file.c:195
 [<ffffffff8156f7b5>] do_loop_readv_writev.part.18+0xd5/0x280 fs/read_write.c:718
 [<ffffffff81574967>] do_loop_readv_writev fs/read_write.c:707 [inline]
 [<ffffffff81574967>] compat_do_readv_writev+0x567/0x7a0 fs/read_write.c:1091
 [<ffffffff81574c82>] compat_readv+0xe2/0x150 fs/read_write.c:1120
 [<ffffffff81575012>] do_compat_preadv64+0x152/0x180 fs/read_write.c:1169
 [<ffffffff815775ab>] C_SYSC_preadv fs/read_write.c:1189 [inline]
 [<ffffffff815775ab>] compat_SyS_preadv+0x3b/0x50 fs/read_write.c:1183
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839fe190>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

The buggy address belongs to the page:
page:ffffea00072197c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801c865f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c865f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801c865f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                     ^
 ffff8801c865f880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c865f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
sd 0:0:1:0: [sg0] tag#246 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK
sd 0:0:1:0: [sg0] tag#246 CDB: opcode=0xff (vendor)
sd 0:0:1:0: [sg0] tag#246 CDB[00]: ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00
sd 0:0:1:0: [sg0] tag#246 CDB[10]: 00 00 00 fd ff ff ff 4d 6e b1 f2 d7 22 a7 4e 00
sd 0:0:1:0: [sg0] tag#246 CDB[20]: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sd 0:0:1:0: [sg0] tag#246 CDB[30]: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
sd 0:0:1:0: [sg0] tag#246 CDB[40]: 00 00 00 00 00 00 00