hid-generic 0000:0000:0000.0002: unknown main item tag 0x0
hid-generic 0000:0000:0000.0002: unknown main item tag 0x0
hid-generic 0000:0000:0000.0002: hidraw0: <UNKNOWN> HID v0.00 Device [syz1] on syz1
==================================================================
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+0x368/0x3b0 arch/x86/kernel/unwind_frame.c:76
Read of size 8 at addr ffff8801d5c87808 by task syz-executor3/5139

CPU: 1 PID: 5139 Comm: syz-executor3 Not tainted 4.9.125+ #40
 ffff8801b8c9f148 ffffffff81af0ae9 ffffea00075721c0 ffff8801d5c87808
 0000000000000000 ffff8801d5c87810 ffff8801d688af80 ffff8801b8c9f180
 ffffffff814e0e1d ffff8801d5c87808 0000000000000008 0000000000000000
Call Trace:
 [<ffffffff81af0ae9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af0ae9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff814e0e1d>] print_address_description+0x6c/0x234 mm/kasan/report.c:256
 [<ffffffff814e1227>] kasan_report_error mm/kasan/report.c:355 [inline]
 [<ffffffff814e1227>] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412
 [<ffffffff814d3664>] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
 [<ffffffff810aae98>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810aae98>] __unwind_start+0x368/0x3b0 arch/x86/kernel/unwind_frame.c:76
 [<ffffffff81075f89>] unwind_start arch/x86/include/asm/unwind.h:39 [inline]
 [<ffffffff81075f89>] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41
 [<ffffffff81076088>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff8163dcc8>] proc_pid_stack+0x148/0x220 fs/proc/base.c:469
 [<ffffffff8163624d>] proc_single_show+0xfd/0x170 fs/proc/base.c:771
 [<ffffffff8155e8f6>] seq_read+0x4b6/0x12d0 fs/seq_file.c:240
 [<ffffffff814ea255>] do_loop_readv_writev.part.1+0xd5/0x280 fs/read_write.c:718
 [<ffffffff814eb8fe>] do_loop_readv_writev fs/read_write.c:707 [inline]
 [<ffffffff814eb8fe>] do_readv_writev+0x56e/0x7b0 fs/read_write.c:873
 [<ffffffff814ebbc4>] vfs_readv+0x84/0xc0 fs/read_write.c:897
 [<ffffffff8158843b>] kernel_readv fs/splice.c:363 [inline]
 [<ffffffff8158843b>] default_file_splice_read+0x44b/0x7e0 fs/splice.c:435
 [<ffffffff8158753c>] do_splice_to+0x10c/0x170 fs/splice.c:899
 [<ffffffff815877df>] splice_direct_to_actor+0x23f/0x7e0 fs/splice.c:971
 [<ffffffff81587f23>] do_splice_direct+0x1a3/0x270 fs/splice.c:1080
 [<ffffffff814edbe0>] do_sendfile+0x4f0/0xc30 fs/read_write.c:1393
 [<ffffffff814efdb1>] C_SYSC_sendfile fs/read_write.c:1469 [inline]
 [<ffffffff814efdb1>] compat_SyS_sendfile+0xd1/0x160 fs/read_write.c:1458
 [<ffffffff81005fd1>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81005fd1>] do_fast_syscall_32+0x2f1/0x860 arch/x86/entry/common.c:387
 [<ffffffff8278d6e0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

The buggy address belongs to the page:
page:ffffea00075721c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801d5c87700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801d5c87780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801d5c87800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                         ^
 ffff8801d5c87880: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2
 ffff8801d5c87900: f2 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00
==================================================================