detected buffer overflow in memcpy
------------[ cut here ]------------
kernel BUG at lib/string.c:1129!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 3 PID: 15249 Comm: kworker/u17:3 Not tainted 5.9.0-rc6-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 cb 00 de fd 48 8b 74 24 08 48 8b 04 24 eb d5 48 89 fe 48 c7 c7 20 c4 db 88 e8 60 3a 86 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:ffffc9000b27f980 EFLAGS: 00010286
RAX: 0000000000000022 RBX: ffff8880287e3a24 RCX: 0000000000000000
RDX: ffff888058751780 RSI: ffffffff815f5985 RDI: fffff5200164ff22
RBP: ffff8880287e39c0 R08: 0000000000000022 R09: ffff88802d1318e7
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001a
R13: 0000000000000020 R14: ffffc9000b27fa40 R15: 1ffff9200164ff3c
FS:  0000000000000000(0000) GS:ffff88802d100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7165f75570 CR3: 000000002a1e2000 CR4: 0000000000350ee0
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 71583e50eca53481 ]---
RIP: 0010:fortify_panic+0xf/0x20 lib/string.c:1129
Code: 89 c7 48 89 74 24 08 48 89 04 24 e8 cb 00 de fd 48 8b 74 24 08 48 8b 04 24 eb d5 48 89 fe 48 c7 c7 20 c4 db 88 e8 60 3a 86 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:ffffc9000b27f980 EFLAGS: 00010286
RAX: 0000000000000022 RBX: ffff8880287e3a24 RCX: 0000000000000000
RDX: ffff888058751780 RSI: ffffffff815f5985 RDI: fffff5200164ff22
RBP: ffff8880287e39c0 R08: 0000000000000022 R09: ffff88802d1318e7
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001a
R13: 0000000000000020 R14: ffffc9000b27fa40 R15: 1ffff9200164ff3c
FS:  0000000000000000(0000) GS:ffff88802d100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc69fe5c6e8 CR3: 0000000009e8d000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400