upstream test error: BUG: got no fallback coverage:

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    6642d600 Merge tag '5.11-rc5-smb3' of git://git.samba.org/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14de59e8d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f75d66d6d359ef2f
dashboard link: https://syzkaller.appspot.com/bug?extid=e6ca682acbbf21043787
userspace arch: arm64

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e6ca682acbbf21043787@xxxxxxxxxxxxxxxxxxxxxxxxx

1970/01/01 00:02:05 connecting to host at 10.0.2.10:40353
1970/01/01 00:02:05 checking machine...
1970/01/01 00:02:05 checking revisions...
ps_root_recvmsgcb: failed to send message to pid 4476: Connection refused
1970/01/01 00:02:05 testing simple program...
1970/01/01 00:02:08 BUG: got no fallback coverage:
loop exited with status 11
ps_root_recvmsgcb: failed to send message to pid 4508: Connection refused
ps_root_recvmsgcb: failed to send message to pid 4544: Connection refused
ps_root_recvmsgcb: failed to send message to pid 4543: Connection refused
ps_bpf_start_bpf: bpf_open: Invalid argument
ps_root_recvmsg: Invalid argument
ps_bpf_start_bpf: bpf_open: Invalid argument
ps_root_recvmsg: Invalid argument
ps_bpf_start_bpf: bpf_open: Invalid argument
ps_root_recvmsg: Invalid argument


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