RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007f4ada7f4ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd24b10bbf R14: 00007f4ada7f59c0 R15: 000000000118bf2c
==================================================================
BUG: KASAN: use-after-free in memcpy include/linux/string.h:373 [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 ffff88803d4f5000 by task syz-executor.2/7811

CPU: 1 PID: 7811 Comm: syz-executor.2 Not tainted 4.19.154-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/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 mm/kasan/report.c:354
 kasan_report+0x8f/0x96 mm/kasan/report.c:412
 memcpy+0x20/0x50 mm/kasan/kasan.c:302
 memcpy include/linux/string.h:373 [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:ffffea0000f53d40 count:0 mapcount:-128 mapping:0000000000000000 index:0x1
flags: 0xfff00000000000()
raw: 00fff00000000000 ffffea00012e7708 ffffea0000f53d88 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88803d4f4f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803d4f4f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88803d4f5000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88803d4f5080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88803d4f5100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================