detected buffer overflow in memcpy ------------[ cut here ]------------ kernel BUG at lib/string.c:1129! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 2889 Comm: kworker/u4:5 Not tainted 5.9.0-rc6-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/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:ffffc900094b7980 EFLAGS: 00010286 RAX: 0000000000000022 RBX: ffff88808cd450a4 RCX: 0000000000000000 RDX: ffff88809d4dc2c0 RSI: ffffffff815f5985 RDI: fffff52001296f22 RBP: ffff88808cd45040 R08: 0000000000000022 R09: ffff8880ae4318e7 R10: 0000000000000000 R11: 1ffffffff19aaa70 R12: 000000000000004f R13: 0000000000000008 R14: ffffc900094b7a40 R15: 1ffff92001296f3c FS: 0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00357b000 CR3: 00000000526ee000 CR4: 00000000001506f0 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 b7cf8efac1035c6d ]--- 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:ffffc900094b7980 EFLAGS: 00010286 RAX: 0000000000000022 RBX: ffff88808cd450a4 RCX: 0000000000000000 RDX: ffff88809d4dc2c0 RSI: ffffffff815f5985 RDI: fffff52001296f22 RBP: ffff88808cd45040 R08: 0000000000000022 R09: ffff8880ae4318e7 R10: 0000000000000000 R11: 1ffffffff19aaa70 R12: 000000000000004f R13: 0000000000000008 R14: ffffc900094b7a40 R15: 1ffff92001296f3c FS: 0000000000000000(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00357b000 CR3: 00000000526ee000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400