r0 = syz_open_procfs$userns(0x0, &(0x7f0000000000))
recvmmsg(0xffffffffffffffff, &(0x7f0000002900)=[{{0x0, 0x0, &(0x7f0000001880)=[{0x0}], 0x1}}], 0x1, 0x0, 0x0)
ioctl$NS_GET_OWNER_UID(r0, 0xb704, &(0x7f0000001540))