RDX: 00007f0ef20cd000 RSI: 0000000000000000 RDI: 00000000004beba8
RBP: 0000000000000000 R08: 00007f0ef20ccff8 R09: ffffffffffffffff
R10: 00007f0ef20ccffc R11: 0000000000000246 R12: 0000000020000180
R13: 00000000200001c0 R14: 0000000000000000 R15: 0000000020000600
==================================================================
BUG: KASAN: use-after-free in memcpy include/linux/string.h:377 [inline]
BUG: KASAN: use-after-free in memcpy_dir crypto/scatterwalk.c:28 [inline]
BUG: KASAN: use-after-free in scatterwalk_copychunks+0x271/0x6a0 crypto/scatterwalk.c:43
Read of size 4096 at addr ffff888083a44000 by task syz-executor.4/20770

CPU: 0 PID: 20770 Comm: syz-executor.4 Not tainted 4.19.187-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report+0x8f/0xa0 mm/kasan/report.c:412
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:377 [inline]
 memcpy_dir crypto/scatterwalk.c:28 [inline]
 scatterwalk_copychunks+0x271/0x6a0 crypto/scatterwalk.c:43
 scatterwalk_map_and_copy crypto/scatterwalk.c:72 [inline]
 scatterwalk_map_and_copy+0x121/0x1a0 crypto/scatterwalk.c:60
 gcmaes_encrypt.constprop.0+0x760/0xd90 arch/x86/crypto/aesni-intel_glue.c:956

The buggy address belongs to the page:
page:ffffea00020e9100 count:0 mapcount:-128 mapping:0000000000000000 index:0x1
flags: 0xfff00000000000()
raw: 00fff00000000000 ffffea0002165d08 ffffea0002200f08 0000000000000000
raw: 0000000000000001 0000000000000002 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888083a43f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888083a43f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888083a44000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888083a44080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888083a44100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================