detected buffer overflow in memcpy
------------[ cut here ]------------
kernel BUG at lib/string.c:1129!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.9.0-rc4-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: btrfs-endio-meta btrfs_work_helper
RIP: 0010:fortify_panic+0xf/0x20 lib/string.c:1129
Code: 89 c7 48 89 74 24 08 48 89 04 24 e8 ab 39 00 fe 48 8b 74 24 08 48 8b 04 24 eb d5 48 89 fe 48 c7 c7 40 22 97 88 e8 b0 8c a9 fd <0f> 0b cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 41 57 41 56 41
RSP: 0018:ffffc900005c7980 EFLAGS: 00010286
RAX: 0000000000000022 RBX: ffff888058321aa4 RCX: 0000000000000000
RDX: ffff88802bdd8940 RSI: ffffffff815dba07 RDI: fffff520000b8f22
RBP: ffff888058321a40 R08: 0000000000000022 R09: ffff88802d1318e7
R10: 0000000000000000 R11: 000000000006cde8 R12: 00000000ffffffd3
R13: 0000000000000008 R14: ffffc900005c7a40 R15: 1ffff920000b8f3c
FS:  0000000000000000(0000) GS:ffff88802ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb8f5308518 CR3: 000000001dbfa000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memcpy include/linux/string.h:405 [inline]
 btree_readpage_end_io_hook.cold+0x206/0x221 fs/btrfs/disk-io.c:642
 end_bio_extent_readpage+0x4de/0x10c0 fs/btrfs/extent_io.c:2854
 bio_endio+0x3cf/0x7f0 block/bio.c:1449
 end_workqueue_fn+0x114/0x170 fs/btrfs/disk-io.c:1695
 btrfs_work_helper+0x221/0xe20 fs/btrfs/async-thread.c:318
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
---[ end trace e91ba21fa41613df ]---
RIP: 0010:fortify_panic+0xf/0x20 lib/string.c:1129
Code: 89 c7 48 89 74 24 08 48 89 04 24 e8 ab 39 00 fe 48 8b 74 24 08 48 8b 04 24 eb d5 48 89 fe 48 c7 c7 40 22 97 88 e8 b0 8c a9 fd <0f> 0b cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 41 57 41 56 41
RSP: 0018:ffffc900005c7980 EFLAGS: 00010286
RAX: 0000000000000022 RBX: ffff888058321aa4 RCX: 0000000000000000
RDX: ffff88802bdd8940 RSI: ffffffff815dba07 RDI: fffff520000b8f22
RBP: ffff888058321a40 R08: 0000000000000022 R09: ffff88802d1318e7
R10: 0000000000000000 R11: 000000000006cde8 R12: 00000000ffffffd3
R13: 0000000000000008 R14: ffffc900005c7a40 R15: 1ffff920000b8f3c
FS:  0000000000000000(0000) GS:ffff88802cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffddcf22ea8 CR3: 00000000630a9000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400