kernel BUG at lib/string.c:1153!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 383 Comm: kworker/u4:8 Not tainted 5.9.0-rc5-next-20200916-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: btrfs-endio-meta btrfs_work_helper
RIP: 0010:fortify_panic+0xf/0x11 lib/string.c:1153
Code: d6 28 6b 03 48 c7 c7 60 48 d8 88 58 5b 5d 41 5c 41 5d 41 5e 41 5f e9 92 31 f8 ff 48 89 fe 48 c7 c7 20 49 d8 88 e8 83 31 f8 ff <0f> 0b e8 b1 3f 75 f9 48 c7 c6 80 bc d8 88 48 89 ef e8 d7 05 05 00
RSP: 0018:ffffc90001ab79d0 EFLAGS: 00010282
RAX: 0000000000000022 RBX: 1ffff92000356f40 RCX: 0000000000000000
RDX: ffff8880a8190540 RSI: ffffffff815ddfc5 RDI: fffff52000356f2c
RBP: ffff888097833790 R08: 0000000000000022 R09: ffff8880ae4318e7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000020
R13: ffff8880978337a0 R14: ffff8880978337f4 R15: ffff888059fc0000
FS:  0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86ee644000 CR3: 0000000062b31000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 memcpy include/linux/string.h:398 [inline]
 btree_readpage_end_io_hook.cold+0x115/0x222 fs/btrfs/disk-io.c:639
 end_bio_extent_readpage+0x4de/0x10c0 fs/btrfs/extent_io.c:2854
 bio_endio+0x3d3/0x7a0 block/bio.c:1449
 end_workqueue_fn+0x114/0x170 fs/btrfs/disk-io.c:1695
 btrfs_work_helper+0x20a/0xd20 fs/btrfs/async-thread.c:318
 process_one_work+0x933/0x15a0 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3af/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Modules linked in:
---[ end trace 243c0882c66ee9d2 ]---
RIP: 0010:fortify_panic+0xf/0x11 lib/string.c:1153
Code: d6 28 6b 03 48 c7 c7 60 48 d8 88 58 5b 5d 41 5c 41 5d 41 5e 41 5f e9 92 31 f8 ff 48 89 fe 48 c7 c7 20 49 d8 88 e8 83 31 f8 ff <0f> 0b e8 b1 3f 75 f9 48 c7 c6 80 bc d8 88 48 89 ef e8 d7 05 05 00
RSP: 0018:ffffc90001ab79d0 EFLAGS: 00010282
RAX: 0000000000000022 RBX: 1ffff92000356f40 RCX: 0000000000000000
RDX: ffff8880a8190540 RSI: ffffffff815ddfc5 RDI: fffff52000356f2c
RBP: ffff888097833790 R08: 0000000000000022 R09: ffff8880ae4318e7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000020
R13: ffff8880978337a0 R14: ffff8880978337f4 R15: ffff888059fc0000
FS:  0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000051d940 CR3: 00000000885d2000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600